User option for the format of the output file. The valid formats are:

• Plotted image GIF
• Generic ASCII file
• Spreadsheet
• Tab-delimited file
• Comma-delimited file
• NetCDF file

Refers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

User option for values in the output file. The valid values for each file are:

Optical Thickness - The latest Aerosol Optical Thickness calculated based on the previous analysis optical thickness, weighted according to its reliability, combined with a weighted average of current observations within a surrounding area which is determined according to the grid point's gradient.

Gradient in X- Direction - Change in optical thickness in the negative direction along the X axis.

Gradient in X+ Direction - Change in optical thickness between the grid point and neighbor points within the field in the positive direction along the X axis.

Gradient in Y- Direction - Change in optical thickness in the negative direction along the Y axis.

Gradient in Y+ Direction - Change in optical thickness in the positive direction along the Y axis.

Average Gradient - The average of the gradients in all four directions (N, S, E, W) from the grid intersection.

Climatological Temperature - The average sea surface temperature of a grid intersection for a particular month over a number of years, taken from the global climatology file.

Spatial Covariance X- - The distance in grid units from the grid intersection to the nearest land mass in the negative direction along the X axis.

Spatial Covariance X+ - The distance in grid units from the grid intersection to the nearest land mass in the positive direction along the X axis.

Spatial Covariance Y- - The distance in grid units from the grid intersection to the nearest land mass in the negative direction along the Y axis.

Spatial Covariance Y+ - The distance in grid units from the grid intersection to the nearest land mass in the positive direction along the Y axis.

Physiographic Descriptor - The land/sea tag indicating whether a grid intersection is a land or sea point.

Age of Most Recent Observation - The age, in hours from the time of last analysis, of the most recent observation used to determine the new optical thickness for a grid intersection.

Class 1 Temporal Coverage - Set of bits (0-15) of which bit 1 is set to 1 for each analysis which included observations with a reliability greater than or equal to a specific minimum reliability considered as class 1. Bit 0 always remains a 0, and all bits are shifted right during each analysis leaving bit 1 a 0 when no class 1 reliability observations are used for a grid intersection.

Number of Observations - The total number of current observations used in the analysis of the new optical thickness for the grid intersection.

Weight/ Reliability - New reliability associated with the new optical thickness, based on the previous reliability combined with the weighted reliability of all observations used in the last analysis.

The dataset names for all 4 EUMETSAT instruments follows the same basic format.

<INSTRUMENT_ID>_<PRODUCT_TYPE>_<PROCESSING_LEVEL>_<SPACECRAFT_ID>_
<SENSING_START>_<SENSING_END>__<PROCESSING_MODE>_<DISPOSITION_MODE>_<PROCESSING_ TIME>__<SOME_DATE>

Information is pending

The ground station to which data was transmitted for the given data set.

Available resolutions are:

25 km Resolution
50 km Resolution
Full Resolution 

Refers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

Delivery option that allows the user to specify whether or not the ordered data will include an archive header. In particular, for data from NOAA-14 and earlier NOAA satellites, the archive header is the TBM (Tera Byte Memory) header which is described in the NOAA Polar Orbiter Data User's Guide located at http://www2.ncdc.noaa.gov/docs/podug/index.htm For data from NOAA-15 and later NOAA satellites, the archive header is the ARS (Archive Retrieval System) header which is described in the NOAA KLM User's Guide located at http://www2.ncdc.noaa.gov/docs/klm/

User option for the data delivery format. Indicates the number of bits to be used to represent each sensor pixel value in the delivery file. Choosing 8 or 16 bits/pixel results in the unpacking of the sensor data and the placing of each pixel value into the indicated number of bits. Note that the sensor data originates in a packed format with each pixel value occupying 10 bits. If 8 is chosen, the least significant of the original 10 bits are discarded. If 16 is chosen, the original 10 bits are preserved and are packed into a 16-bit word. Choosing 8 or 16 bits/pixel also allows users to select which combination of channels they want in their delivery files. Choosing 10 bits/pixel results in the data being delivered in the original packed format with all 5 channels. Users cannot perform channel selection if they choose 10 bits/pixel.

User option for the data delivery format. The channel number, or band, of the instrument that acquired the data. Channel numbers are associated with different wavelengths or ranges of wavelengths within the electromagnetic spectrum. Users may choose which combination of channels they wish to receive in their delivery files if, and only if, they choose either 8 or 16 for the bits/pixel value.

The name of the Level 1B data set archived at CLASS.
The name has the following format: Processing-Center.Data-Type.Spacecraft-Unique-ID.Year-Day.Start-Time.Stop-Time.Processing-Block-ID.Source with each qualifier defined below:

The data types available for AVHRR are:

Full Resolution Area Coverage (FRAC): AVHRR FRAC data, the user may choose 1 km or 4 km as their default, available in swaths typically covering roughly an orbits worth of data. FRAC data is available for all areas of the globe and is available for data from the METOP satellites.

Global Area Coverage (GAC): AVHRR data at the reduced 4KM resolution, available in swaths typically covering roughly an orbits worth of data. GAC data is available for all areas of the globe.

High Resolution Picture Transmission (HRPT): Limited area AVHRR data at the full 1KM resolution, available in swaths typically covering roughly 12 minutes worth of an orbit. HRPT data is only available for areas of the earth scanned by the sensor while the satellite is within range of a receiving station.

Local Area Coverage (LAC): Limited area AVHRR data at the full 1KM resolution, available in swaths typically covering roughly 12 minutes worth of data. LAC data is recorded on-board the satellite and transmitted to a receiving station once the satellite is within range of the station. Because of limitations in the amount of data that can be stored on the satellites recorders, LAC data is limited and the acquisition of the data is scheduled.

The GMT date and time corresponding to the end of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

The ascending node refers to that portion of the orbit during which the satellite is heading northward. Descending refers to the southbound portion.

The number of the orbit (revolution) in which the satellite was traveling when the data was acquired.

Flags indicating data quality.

The ground station to which data was transmitted for the given data set.

For LAC and HRPT, the instantaneous field-of-view (IFOV) of each channel is approximately 1.4 milliradians (mr) leading to a resolution at the satellite subpoint of 1.1 km for a nominal altitude of 833 km. This is generally referred to as 1 km resolution. Since GAC data contain only one out of three original AVHRR lines and the data volume and resolution are further reduced by averaging every four adjacent samples and skipping the fifth sample along the scan line, the effective resolution is 1.1 x 4 km with a 3 km gap between pixels across the scan line. This is generally referred to as 4 km resolution.

For AVHRR FRAC data, the user may choose 1 km or 4 km as their default.
For the other AVHRR datatypes, the resolution is fixed and cannot be changed. The values are 1 km for LAC and HRPT, and 4 km for GAC.

The satellite that acquired the AVHRR data.

The size of the file to be delivered to the user in bytes.

Refers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

User option for the format of the output file. The valid formats are:

• Plotted image GIF
• Generic ASCII file
• Spreadsheet
• Tab-delimited file
• Comma-delimited file
• NetCDF file

Refers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

User option for values in the output Pathfinder (from AVHRR) file. The valid values for each file are:

• Absorbed Solar Flux (clear/day)
• Absorbed Solar Flux (total/day)
• Aerosol Optical Thickness (day)
• Outgoing Long Wave Radiation (clear/day)
• Outgoing Long Wave Radiation (clear/night)
• Outgoing Long Wave Radiation (total/day)
• Outgoing Long Wave Radiation (total/night)
• Total Fractional Cloud Coverage (day)
• Total Fractional Cloud Coverage (night)

Coral Bleach SST Global 50km HDF File

The name of the data set archived at CLASS. The name has the following format: sst.coralreef.fields.50km.n18.20070531.hdf

The size in bytes of the file to be delivered to the user.

A unique numerical ID assigned to the dataset for CLASS inventory purposes.

Abbreviation that identifies the satellite that acquired the dataset.

N18 is the satellite acquiring the Coral Bleach SST Global 50km HDF File.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The name of the CoastWatch data set archived at CLASS. The name has the following format: Year_Julian-Day_Start-Time_Spacecraft-Unique-ID_CoastWatch-Region-Code.File-Format with each qualifier defined below:

(Bytes) - The size of the file to be delivered to the user in bytes.

Code internal to CLASS for the source of CoastWatch mapped data in HDF format

A unique numerical ID assigned to the data set for CLASS inventory purposes.

Currently not applicable to CoastWatch hdf data.

Identifies a CoastWatch region to which the data is mapped. Valid regions are:

The satellite that acquired the AVHRR data.

Not applicable to CoastWatch hdf data.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The name of the CoastWatch swath data set archived at CLASS. The name has the following format:

* Year_Julian-Day_Start-Time_Spacecraft-Unique-ID_Receiving-Station-Code.File-Format
with each qualifier defined below:

Code internal to CLASS for the source of CoastWatch mapped data in HDF format

A unique numerical ID assigned to the data set for CLASS inventory purposes.

Currently not applicable to CoastWatch hdf data.

The ground station to which data was transmitted for the given data set from which CoastWatch data was created.

The name of the CoastWatch data set archived at CLASS. There are two different naming formats used for these files:

• CoastWatch-RegionYearDayStart-Time.CoastWatch-SubregionProduct-Type with each qualifier defined below:

• Year_Day_Start-Time_Spacecraft-Unique-ID_CoastWatch-RegionCoastWatchSubregion_Product-Type. File-Format with each qualifier defined below:

The size of the file to be delivered to the user in bytes.

Code internal to CLASS for the source of CoastWatch regional input data.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

The datatypes or products available for the CoastWatch Alaska region are:

B1 = daytime/nighttime split window multi-channel sea-surface-temperature (c4 and c5)
B7 = daytime/nighttime split-window non-linear sea-surface-temperature (c4 and c5)
BM = daytime/nighttime multiple sea-surface-temperature algorithm
C1 = AVHRR channel 1 albedo (%)
C2 = AVHRR channel 2 albedo (%)
C4 = AVHRR channel 4 brightness temperature (deg C)
CM = cloud mask
D1 = daytime split-window multi-channel sea-surface-temperature (c4 and c5)
D7 = daytime split-window non-linear sea-surface-temperature (c4 and c5)
S1 = nighttime split-window multi-channel sea-surface-temperature
S3 = nighttime triple-window multi-channel sea-surface-temperature
S7 = nighttime split-window non-linear sea-surface-temperature
S9 = nighttime triple-window non-linear sea-surface-temperature
SM = nighttime multiple sea-surface-temperature algorithm

Identifies the five character CoastWatch region that the data is mapped to. Valid regions are:

The satellite that acquired the CoastWatch data.

Valid CoastWatch subregions are:

AA = Aleutian Islands synoptic
AB = Beaufort
AC = Chukchi
AG = Gulf of Alaska
AH = Anchorage
AJ = Juneau
AL = Aleutian Islands
AN = Northern Alaska synoptic
AS = Southern Alaska synoptic
AT = Bering Straight
AU = Unalaska
AV = Vancouver
AW = Western Alaska Synoptic
AX = Southern Alaska
AY = Western Alaska
AZ = Northern Alaska

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The name of the CoastWatch data set archived at CLASS. There are two different naming formats used for these files:

• CoastWatch-RegionYearDayStart-Time.CoastWatch-SubregionProduct-Type with each qualifier defined below:

Qualifier	Details
CoastWatch-Region	One character identifying the CoastWatch Region to which this data applies. Valid character is: c = Caribbean
Year	Last two digits of the year (99 = 1999, 00 = 2000), which identifies the year in which the spacecraft began recording the data set.
Day	Day of the year [001-366], which identifies the Julian day on which the spacecraft began recording the data set.
Start-time	e.g. 13, where "13" denotes 13 hours UTC (to the nearest hour) and represents the time at which spacecraft recording began.
CoastWatch-Subregion	One character identifying sub-regions within the CoastWatch region to which data pertains. Valid sub-region characters are: p = Puerto Rico high resolution j = Jamaica high resolution
Datatype	Two characters identifying codes for the types of products. Valid character groups are: c2 = AVHRR channel 2 albedo (%) c4 = AVHRR channel 4 brightness temperature (deg C) cm = cloud mask d7 = daytime split-window non-linear sea-surface-temperature (c4 and c5) s3 = nighttime triple-window multi-channel sea-surface-temperature (c3, c4, c5) s7 = nighttime split-window non-linear sea-surface-temperature (c4 and c5) s9 = nighttime triple-window non-linear sea-surface-temperature (c3, c4, c5) sm = nighttime multiple sea-surface-temperature algorithm

• Year_Day_Start-Time_Spacecraft-Unique-ID_CoastWatch-RegionCoastWatchSubregion_Product-Type. File-Format with each qualifier defined below:

Qualifier	Details
Year	Full year with century, e.g., 2005, which identifies the year in which the spacecraft began recording the data set.
Day	Day of the year [001-366], which identifies the Julian day on which the spacecraft began recording the data set.
Start-Time	e.g. 1355, where "1355" denotes 13 hours 55 minutes UTC (to the nearest minute) and represents the time at which spacecraft recording began.
Spacecraft-Unique-ID	n15 = NOAA-15 (NOAA-K) n16 = NOAA-16 (NOAA-L) n17 = NOAA-17 (NOAA-M)
CoastWatch-Region	One character identifying CoastWatch Region to which this data applies. Valid characters is: c = Caribbean
CoastWatch-Subregion	One or two characters identifying sub-regions within the CoastWatch region to which the data pertains. Valid sub-region characters are: p = Puerto Rico high resolution j = Jamaica high resolution bz = Belize cj = Cuba/Jamaica synoptic ec = East Caribbean synoptic eg = East Gulf of Mexico synoptic fk = Florida Keys gp = Gulf of Papayayo synoptic gt = Gulf of Tehuantepec synoptic nf = Northern Florida sa = San Andreas Bight synoptic wg = West Gulf of Mexico synoptic yc = Yucatan Channel bh = Bahamas dh = Dominican Rep/Haiti synoptic fb = Flower Garden Banks gr = Grays Reef la = Lesser Antilles synoptic mm = Mazatlan/Mexico synoptic pc = Panama/W. Columbia synoptic vc = Venezuala/Columbia synoptic wc = West Caribbean synoptic xs = Full Regional panel (2.5 km) xx = Full Regional panel (10 km) yp = Yucatan Peninsula synoptic
Product-Type	Two characters identifying codes for the types of products. Valid character groups are: c2 = AVHRR channel 2 albedo (%) c4 = AVHRR channel 4 brightness temperature (deg C)cm = cloud mask d7 = daytime split-window non-linear sea-surface-temperature (c4 and c5) s3 = nighttime triple-window multi-channel sea-surface-temperature (c3, c4, c5) s7 = nighttime split-window non-linear sea-surface-temperature (c4 and c5) s9 = nighttime triple-window non-linear sea-surface-temperature (c3, c4, c5) sm = nighttime multiple sea-surface-temperature algorithm
File-Format	cwf ( denotes CoastWatch Format)

The size of the file to be delivered to the user in bytes.

Code internal to CLASS for the source of CoastWatch regional input data.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

The datatypes or products available for the CoastWatch Caribbean region are:

C2 = AVHRR channel 2 albedo (%)
C4 = AVHRR channel 4 brightness temperature (deg C)
CM = cloud mask
D7 = daytime split-window non-linear sea-surface-temperature (c4 and c5)
S3 = nighttime triple-window multi-channel sea-surface-temperature
S7 = nighttime split-window non-linear sea-surface-temperature
S9 = nighttime triple-window non-linear sea-surface-temperature
SM = nighttime multiple sea-surface-temperature algorithm

Identifies the five character CoastWatch region that the data is mapped to. Valid regions are:

Five Letter Code	CoastWatch Region
CWCAR	CoastWatch Region Caribbean

The satellite that acquired the CoastWatch data.

Valid CoastWatch subregions are:

CP = Puerto Rico high resolution
CJ = Jamaica high resolution
CBZ = Belize
CCJ = Cuba/Jamaica synoptic
CEC = East Caribbean synoptic
CEG = East Gulf of Mexico synoptic
CFK = Florida Keys
CGP = Gulf of Papayayo synoptic
CGT = Gulf of Tehuantepec synoptic
CNF = Northern Florida
CSA = San Andreas Bight synoptic
CWG = West Gulf of Mexico synoptic
CYC = Yucatan Channel
CBH = Bahamas
CDH = Dominican Rep/Haiti synoptic
CFB = Flower Garden Banks
CGR = Grays Reef
CLA = Lesser Antilles synoptic
CMM = Mazatlan/Mexico synoptic
CPC = Panama/W. Columbia synoptic
CVC = Venezuala/Columbia synoptic
CWC = West Caribbean synoptic
CXS = Full Regional panel (2.5 km)
CXX = Full Regional panel (10 km)
CYP = Yucatan Peninsula synoptic

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The name of the CoastWatch data set archived at CLASS. There are two different naming formats used for these files:

CoastWatch-RegionYearDayStart-Time.CoastWatch-SubregionProduct-Type with each qualifier defined below:

• Year_Day_Start-Time_Spacecraft-Unique-ID_CoastWatch-RegionCoastWatchSubregion_Product-Type. File-Format with each qualifier defined below:

The size of the file to be delivered to the user in bytes.

Code internal to CLASS for the source of CoastWatch regional input data.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

The datatypes or products available for CoastWatch Gulf of Mexico are:

B7 = daytime/nighttime split-window non-linear sea-surface-temperature (c4 and c5)
BM = daytime/nighttime multiple sea-surface-temperature algorithm
C1 = AVHRR channel 1 albedo (%)
C2 = AVHRR channel 2 albedo (%)
C3 = AVHRR channel 3 brightness temperature (deg C)
C4 = AVHRR channel 4 brightness temperature (deg C)
C5 = AVHRR channel 5 brightness temperature (deg C)
CM = cloud mask
D1 = daytime split-window multi-channel sea-surface-temperature (c4 and c5)
D7 = daytime split-window non-linear sea-surface-temperature (c4 and c5)
S3 = nighttime triple-window multi-channel sea-surface-temperature
S7 = nighttime split-window non-linear sea-surface-temperature
S9 = nighttime triple-window non-linear sea-surface-temperature
SM = nighttime multiple sea-surface-temperature algorithm
ZA = Solar zenith angle (degrees)

Identifies the five character CoastWatch region that the data is mapped to. Valid regions are:

The satellite that acquired the CoastWatch data.

Valid CoastWatch subregions are:

MT = Texas high resolution
MC = Central Gulf Coast high resolution
MW = West Florida high resolution
ML = Louisiana and Mississippi high resolution
MY = Gulf of Mexico synoptic
MP = Yucatan Peninsula high resolution
MX = Extended Gulf of Mexico
MR = Full Regional Panel

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The name of the CoastWatch data set archived at CLASS. There are two different naming formats used for these files:

• CoastWatch-RegionYearDayStart-Time.CoastWatch-SubregionProduct-Type with each qualifier defined below:

• Year_Day_Start-Time_Spacecraft-Unique-ID_CoastWatch-RegionCoastWatchSubregion_Product-Type. File-Format with each qualifier defined below:

The size of the file to be delivered to the user in bytes.

Code internal to CLASS for the source of CoastWatch regional input data.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

The datatypes or products available for the CoastWatch Great Lakes node are:

BM = daytime/nighttime multiple sea-surface-temperature algorithm
C1 = AVHRR channel 1 albedo (%)
C2 = AVHRR channel 2 albedo (%)
C3 = AVHRR channel 3 brightness temperature (deg C)
C4 = AVHRR channel 4 brightness temperature (deg C)
C5 = AVHRR channel 5 brightness temperature (deg C)
CM = cloud mask
D1 = daytime split-window multi-channel sea-surface-temperature (c4 and c5)
D4 = daytime split-window cross product sea-surface-temperature (c4 and c5)
D5 = daytime dual-window cross product sea-surface-temperature (c3 and c4)
D6 = daytime triple-window cross product sea-surface-temperature (c3, c4, c5)
D7 = daytime split-window non-linear sea-surface-temperature (c4 and c5)
S1 = nighttime split-window multi-channel sea-surface-temperature
S3 = nighttime triple-window multi-channel sea-surface-temperature
S7 = nighttime split-window non-linear sea-surface-temperature
S9 = nighttime triple-window non-linear sea-surface-temperature
SZ = Satellite zenith angle (degrees)
ZA = Solar zenith angle (degrees)

Identifies the five character CoastWatch region that the data is mapped to. Valid regions are:

The satellite that acquired the CoastWatch data.

Valid CoastWatch subregions are:

GL = Entire 5 lake region synoptic
GS = Superior and northern Michigan high resolution
GM = Michigan and Huron high resolution
GE = Erie and Ontario high resolution
GR = Full Regional Panel

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The name of the CoastWatch data set archived at CLASS. There are two different naming formats used for these files:

• CoastWatch-RegionYearDayStart-Time.CoastWatch-SubregionProduct-Type with each qualifier defined below:

The size of the file to be delivered to the user in bytes.

Code internal to CLASS for the source of CoastWatch regional input data.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

The datatypes or products available for CoastWatch regions are:

B7 = daytime/nighttime split-window non-linear sea-surface-temperature (c4 and c5)
BM = daytime/nighttime multiple sea-surface-temperature algorithm
C1 = AVHRR channel 1 albedo (%)
C2 = AVHRR channel 2 albedo (%)
C3 = AVHRR channel 3 brightness temperature (deg C)
C4 = AVHRR channel 4 brightness temperature (deg C)
C5 = AVHRR channel 5 brightness temperature (deg C)
CM = cloud mask
D1 = daytime split-window multi-channel sea-surface-temperature (c4 and c5)
D7 = daytime split-window non-linear sea-surface-temperature (c4 and c5)
S3 = nighttime triple-window multi-channel sea-surface-temperature
S7 = nighttime split-window non-linear sea-surface-temperature
S9 = nighttime triple-window non-linear sea-surface-temperature
SM = nighttime multiple sea-surface-temperature algorithm
ZA = Solar zenith angle (degrees)

Identifies the five character CoastWatch region that the data is mapped to. Valid regions are:

The satellite that acquired the CoastWatch data.

Valid CoastWatch subregions are:

HY = Hawaiian synoptic
HH = Main Island mesoscale

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Temporal

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

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Time

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The name of the CoastWatch data set archived at CLASS. There are two different naming formats used for these files:

• CoastWatch-RegionYearDayStart-Time.CoastWatch-SubregionProduct-Type with each qualifier defined below:

• Year_Day_Start-Time_Spacecraft-Unique-ID_CoastWatch-RegionCoastWatchSubregion_Product-Type. File-Format with each qualifier defined below:

The size of the file to be delivered to the user in bytes.

Code internal to CLASS for the source of CoastWatch regional input data.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

The datatypes or products available for the CoastWatch Northeast region are:

B7 = daytime/nighttime split-window non-linear sea-surface-temperature (c4 and c5)
BM = daytime/nighttime multiple sea-surface-temperature algorithm
C1 = AVHRR channel 1 albedo (%)
C2 = AVHRR channel 2 albedo (%)
C3 = AVHRR channel 3 brightness temperature (deg C)
C4 = AVHRR channel 4 brightness temperature (deg C)
C5 = AVHRR channel 5 brightness temperature (deg C)
CM = cloud mask
D1 = daytime split-window multi-channel sea-surface-temperature (c4 and c5)
D7 = daytime split-window non-linear sea-surface-temperature (c4 and c5)
S3 = nighttime triple-window multi-channel sea-surface-temperature
S7 = nighttime split-window non-linear sea-surface-temperature
S9 = nighttime triple-window non-linear sea-surface-temperature
SM = nighttime multiple sea-surface-temperature algorithm
SZ = Satellite zenith angle (degrees)
ZA = Solar zenith angle (degrees)
ZR = Relative azimuth angle (degrees)

Identifies the five character CoastWatch region that the data is mapped to. Valid regions are:

The satellite that acquired the CoastWatch data.

Valid CoastWatch subregions are:

EM = Gulf of Maine high resolution
EG = Georges Bank high resolution
ED = Dump site 106 high resolution
ER = Full Regional panel
ES = Southern New England high resolution
EC = Chesapeake Bay high resolution
EN = Northeast synoptic
EE = Extended NE region

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The name of the CoastWatch data set archived at CLASS. There are two different naming formats used for these files:

• CoastWatch-RegionYearDayStart-Time.CoastWatch-SubregionProduct-Type with each qualifier defined below:

• Year_Day_Start-Time_Spacecraft-Unique-ID_CoastWatch-RegionCoastWatchSubregion_Product-Type. File-Format with each qualifier defined below:

The size of the file to be delivered to the user in bytes.

Code internal to CLASS for the source of CoastWatch regional input data.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

The datatypes or products available for the CoastWatch Southeast region are:

B7 = daytime/nighttime split-window non-linear sea-surface-temperature (c4 and c5)
BM = daytime/nighttime multiple sea-surface-temperature algorithm
C1 = AVHRR channel 1 albedo (%)
C2 = AVHRR channel 2 albedo (%)
C3 = AVHRR channel 3 brightness temperature (deg C)
C4 = AVHRR channel 4 brightness temperature (deg C)
C5 = AVHRR channel 5 brightness temperature (deg C)
CM = cloud mask
D1 = daytime split-window multi-channel sea-surface-temperature (c4 and c5)
D2 = daytime dual-window multi-channel sea-surface-temperature (c3 and c4)
D4 = daytime split-window cross product sea-surface-temperature (c4 and c5)
D5 = daytime dual-window cross product sea-surface-temperature (c3 and c4)
D6 = daytime triple-window cross product sea-surface-temperature (c3, c4, c5)
D7 = daytime split-window non-linear sea-surface-temperature (c4 and c5)
S1 = nighttime split-window multi-channel sea-surface-temperature
S2 = nighttime dual-window multi-channel sea-surface-temperature
S3 = nighttime triple-window multi-channel sea-surface-temperature
S6 = nighttime triple-window cross product sea-surface-temperature
S7 = nighttime split-window non-linear sea-surface-temperature
S9 = nighttime triple-window non-linear sea-surface-temperature
SM = nighttime multiple sea-surface-temperature algorithm
ZA = Solar zenith angle (degrees)

Identifies the five character CoastWatch region that the data is mapped to. Valid regions are:

The satellite that acquired the CoastWatch data.

Valid CoastWatch subregions are:

SN = North Carolina high resolution
SG = South Carolina and Georgia high resolution
SE = East Florida high resolution
SS = South Florida high resolution
SW = West Florida high resolution
SY = Southeast synoptic
SX = Extended SE region
SR = Full Regional Panel

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The name of the CoastWatch data set archived at CLASS. There are two different naming formats used for these files:

• CoastWatch-RegionYearDayStart-Time.CoastWatch-SubregionProduct-Type with each qualifier defined below:

• Year_Day_Start-Time_Spacecraft-Unique-ID_CoastWatch-RegionCoastWatchSubregion_Product-Type. File-Format with each qualifier defined below:

The size of the file to be delivered to the user in bytes.

Code internal to CLASS for the source of CoastWatch regional input data.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

The datatypes or products available for the CoastWatch West Coast region are:

B7 = daytime/nighttime split-window non-linear sea-surface-temperature (c4 and c5)
BM = daytime/nighttime multiple sea-surface-temperature algorithm
C1 = AVHRR channel 1 albedo (%)
C2 = AVHRR channel 2 albedo (%)
C4 = AVHRR channel 4 brightness temperature (deg C)
CM = cloud mask
D1 = daytime split-window multi-channel sea-surface-temperature (c4 and c5)
D7 = daytime split-window non-linear sea-surface-temperature (c4 and c5)
S3 = nighttime triple-window multi-channel sea-surface-temperature
S7 = nighttime split-window non-linear sea-surface-temperature
S9 = nighttime triple-window non-linear sea-surface-temperature
SM = nighttime multiple sea-surface-temperature algorithm

Identifies the five character CoastWatch region that the data is mapped to. Valid regions are:

The satellite that acquired the CoastWatch data.

Valid CoastWatch subregions are:

WC = Central California
WE = Northern Baja Mexico
WJ = Baja Mexico synoptic
WY = West Coast synoptic (LAC)
WZ = West Coast synoptic (GAC)
WO = Oregon high resolution
WL = Southern California high resolution
WW = Washington high resolution
WS = Southwest region high resolution
WU = Northern California high resolution
WN = Northwest region high resolution
WB = British Columbia synoptic
WF = CalCOFI synoptic
WM = Southern Baja Mexico
WP = Central Baja Mexico
WV = Vancouver Island
WX = Full Regional panel (2.5 km)
WR = Full Regional Panel

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The name of the data set archived at CLASS. The name has the following format: Processing-Center.Data-Type.Spacecraft-Unique-ID.Year-Day.Start-Time.Stop-Time.Processing-Block-ID.Source with each qualifier defined below:

The data types available for DMSP are:

• Environmental Data Records (EDR) - Environmental data records of geophysical parameters derived from the Special Sensor Microwave/Imager.
• Sensor Data Records (SDR) - Sensor data records of brightness temperatures derived from the Special Sensor Microwave/Imager.
• Temperature Data Records (TDR) - Temperature data records of antenna temperatures derived from the Special Sensor Microwave/Imager.
• SSM/T-1 Level 1B - Temperature sounder data derived from the Special Sensor Microwave Temperature (SSM/T-1) sounder and processed into level 1B format by NOAA/NESDIS/IPD.
• SSM/T-2 Level 1B - Humidity sounder data derived from the Special Sensor Microwave Vapor Profiler (SSM/T-2) and processed into level 1B format by NOAA/NESDIS/IPD.

The GMT date and time corresponding to the end of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

The ascending node refers to that portion of the orbit during which the satellite is heading northward. Descending refers to the southbound portion.

The number of the orbit (revolution) in which the satellite was traveling when the data was acquired.

Flags indicating data quality.

Fixed field with value NS designating that there was No Station.

The satellite that acquired the DMSP data.

The size of the file to be delivered to the user in bytes.

Allows users to search for data from a specific region on the map.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

User option for the format of the output file. The valid formats are:

• Plotted image GIF
• Generic ASCII file
• Spreadsheet
• Tab-delimited file
• Comma-delimited file
• NetCDF file

Refers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

User option for values in the output file. The valid options for values for each file are:

• Surface Temperature - A measurement of the temperature at the surface in land regions.
• Soil Moisture - The percentage of moisture for the land regions.
• Cloud Liquid Water - An indication of the amount of liquid water present in the clouds.
• Surface Wind - The surface wind in m/sec
• Ice Concentration - The percentage of ice over the oceans.
• Water Vapor - A measurement of the water vapor concentration over the oceans.
• Rain Rate - A measurement of the rainfall intensity over the Earth's surface.
• Snow Depth - A measurement of the depth of recently accumulated dry snow.

User option for the format of the output file. The valid formats are:

• Plotted image GIF
• Generic ASCII file
• Spreadsheet
• Tab-delimited file
• Comma-delimited file
• NetCDF file

Refers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

User option for values in the output file. The valid options for values for each file are:

• Surface Temperature - A measurement of the temperature at the surface in land regions.
• Soil Moisture - The percentage of moisture for the land regions.
• Cloud Liquid Water - An indication of the amount of liquid water present in the clouds.
• Surface Wind - The surface wind in m/sec
• Ice Concentration - The percentage of ice over the oceans.
• Water Vapor - A measurement of the water vapor concentration over the oceans.
• Rain Rate - A measurement of the rainfall intensity over the Earth's surface.
• Snow Depth - A measurement of the depth of recently accumulated dry snow.

User option for the format of the output file. The valid formats are:

• Plotted image GIF
• Generic ASCII file
• Spreadsheet
• Tab-delimited file
• Comma-delimited file
• NetCDF file

Refers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

User option for values in the output file. The valid options for values for each file are:

• Surface Temperature - A measurement of the temperature at the surface in land regions.
• Soil Moisture - The percentage of moisture for the land regions.
• Cloud Liquid Water - An indication of the amount of liquid water present in the clouds.
• Surface Wind - The surface wind in m/sec
• Ice Concentration - The percentage of ice over the oceans.
• Water Vapor - A measurement of the water vapor concentration over the oceans.
• Rain Rate - A measurement of the rainfall intensity over the Earth's surface.
• Snow Depth - A measurement of the depth of recently accumulated dry snow.

User option for the format of the output file. The valid formats are:

• Plotted image GIF
• Generic ASCII file
• Spreadsheet
• Tab-delimited file
• Comma-delimited file
• NetCDF file

Refers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

User option for values in the output file. The valid options for values for each file are:

• Surface Temperature - A measurement of the temperature at the surface in land regions.
• Soil Moisture - The percentage of moisture for the land regions.
• Cloud Liquid Water - An indication of the amount of liquid water present in the clouds.
• Surface Wind - The surface wind in m/sec
• Ice Concentration - The percentage of ice over the oceans.
• Water Vapor - A measurement of the water vapor concentration over the oceans.
• Rain Rate - A measurement of the rainfall intensity over the Earth's surface.
• Snow Depth - A measurement of the depth of recently accumulated dry snow.

Dataset Name - The name of the GOES-SST data set archived at CLASS. There are five different naming formats as below:

1. Data-Type_Year_Day_Hour with each qualifier defined below:

2. Format for new GOESSST Data-Type_Data-Format_Year_Day_Hour.File-format with each qualifier defined below:

3. Data-Type_Data-Format_Spacecraft-Unique-ID_Year_Day_Hour.File-Format with each qualifier defined below:

4. Data-Type_Year_Day_Hour_Data-Format.File Format&#160;with each qualifier defined below:

6.Datatype-Year_frt.Z

Dataset Names for Gridded SST fields from the Japanese geosynchronous satellite MTSAT data

Datatype: MT_SST1
sst1bJ_yyyy_ddd_hh.Z      (e.g. sst1bJ_2007_312_18.Z)  description:   hourly SST retrievals from MTSAT (Japanese geosynchronous),  with Bayesian cloud mask gridded to cylindrical projection array size - 2100 rows x 2000 columns;   grid resolution  0.05 deg x 0.5deg geographic coverage:   longitude  [80,180E],  lat [-45, +60]   (satellite is located near Japan)
sst1oJ_yyyy_ddd_hh.Z      (e.g. sst1oJ_2007_312_18.Z)  Screened SST.  Produced from 1b dataset (above)  In "old" format.  Contains screened SST retrievals only, with pixels labeled as cloudy when clud probability estimate is above threshhold value  (currently 5%).

Datatype: MT_SST3
sst3bJ_yyyy_ddd_hh.Z      (e.g. sst3bJ_2007_312_18.Z)  3-hour averaged SST,  observation times centered on nominal dataset time
sst3oJ_yyyy_ddd_hh.Z      (e.g. sst3oJ_2007_312_18.Z)  description:    Screened version of 3-hourly sst.

Datatype: MT_SST24
sst24bJ_yyyy_ddd.Z      (e.g. sst24bJ_2007_311.Z)  description:   24-hour averaged SST,   averaging all hourly datasets from the nominal day
sst24oJ_yyyy_ddd.Z      (e.g. sst3oJ_2007_311.Z)  description:    screened version

Datatype:  MT_MACH
matchJ_2007_312.18s.gz    - buoy data matchups "short", ascii version
matchJ_2007_312.19b.gz  - buoy data matchups, binary version, with additional parameters 

The size in bytes of the file to be delivered to the user.

Code with value GOSST used internally by CLASS to indicate the source of the data.

The data types available for GOESSST are:

The Gridded SST datatypes form the Japanese geosynchronous satellite MSAT

A unique numerical ID assigned to the data set for CLASS inventory purposes.

Identifies the CoastWatch region to which the GOES CoastWatch regional SST data is mapped. Only applicable to GOES CoastWatch regional SST data. Valid regions are:

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

README.ASCII

New Product README.TXT

The dataset names for all 4 EUMETSAT instruments follows the same basic format.

<INSTRUMENT_ID>_<PRODUCT_TYPE>_<PROCESSING_LEVEL>_<SPACECRAFT_ID>_
<SENSING_START>_<SENSING_END>__<PROCESSING_MODE>_<DISPOSITION_MODE>_<PROCESSING_ TIME>__<SOME_DATE>

Backlog
Nominal
Reprocessing
Validation

The ground station to which data was transmitted for the given data set.

Fairbanks, AK
ReferenceUser Station
SOCC
Svalbard
Wallops Island VA
 

Refers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The dataset names for all 4 EUMETSAT instruments follows the same basic format.

<INSTRUMENT_ID>_<PRODUCT_TYPE>_<PROCESSING_LEVEL>_<SPACECRAFT_ID>_
<SENSING_START>_<SENSING_END>__<PROCESSING_MODE>_<DISPOSITION_MODE>_<PROCESSING_ TIME>__<SOME_DATE>

The GMT date and time corresponding to the end of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The size of the file to be delivered to the user in bytes.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

<INSTRUMENT_ID>_<PRODUCT_TYPE>_<PROCESSING_LEVEL>_<SPACECRAFT_ID>_
<SENSING_START>_<SENSING_END>__<PROCESSING_MODE>_<DISPOSITION_MODE>_<PROCESSING_ TIME>__<SOME_DATE>

The datatypes available is GOMETOGRAN.

The GMT date and time corresponding to the end of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

Standard definition form CLASS for time span.

The dataset names for all EUMETSAT instruments follows the same basic format.

<INSTRUMENT_ID>_<PRODUCT_TYPE>_<PROCESSING_LEVEL>_<SPACECRAFT_ID>_
<SENSING_START>_<SENSING_END>__<PROCESSING_MODE>_<DISPOSITION_MODE>_<PROCESSING_ TIME>__<SOME_DATE>

Backlog
Nominal
Reprocessing
Validation

The ground station to which data was transmitted for the given data set.

Fairbanks, AK
ReferenceUser Station
SOCC
Svalbard
Wallops Island VA

The size of the file to be delivered to the user in bytes.

GOES East Full Disk Scan Sector
GOES East Northern Hemisphere Extended Scan Sector
GOES West Full Disk Scan Sector
GOES West Northern Hemisphere Extended Scan Sector

A unique numerical ID assigned to the dataset for CLASS inventory purposes.

Abbreviation that identifies the satellite that acquired the dataset.

Listed below are the definitions of the abbreviated satellite IDs:

GOES - 11
GOES - 12
GOES - 13

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

Synonymous with channel number. The channel number, or band, of the instrument that acquired the data. Channel numbers are associated with different wavelengths or ranges of wavelengths within the electromagnetic spectrum, e.g. on GOES, channel 1 is 3900 nm

User option for the data delivery format. Indicates the number of bits to be used to represent each sensor pixel value in the delivery file. Choosing 8 or 16-bits/pixel results in the unpacking of the sensor data and the placing of each pixel value into the indicated number of bits. Note that the sensor data originates in a packed format with each pixel value occupying 10 bits. If 8 is chosen, the original 10-bit raw data is reduced to 8 bits/pixel. If 16 is chosen, the original 10 bits are preserved and are packed into a 16-bit word.

User interface note: Users can specify bits/pixel in the formatting of their extracted data. Selections 8 and 16 are for unpacked extraction and allow users to subsequently specify which channels they wish to receive. If users specify raw data, they will receive all channels in the original 10-bits/pixel format.

The channel number, or band, of the instrument that acquired the data. Channel numbers are associated with different wavelengths or ranges of wavelengths within the electromagnetic spectrum, e.g. on GOES, channel 1 is 3900 nm.

Does not apply to B11 data.

The name of the Level 1B data set archived at CLASS. The name has the following format: <Satellite ID>.<Year>.<Julian Day>.<Start Time>
e.g. g12.2004.160.18

The size in bytes of the file to be delivered to the user.

Code internal to CLASS for the source of GVAR data.

The element number of the easternmost pixel of the dataset. Elements are the index for the horizontal x-axis of a scan.

The GMT date and time corresponding to the end of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

Checking the subset flag means that, if users perform a non-global spatial search, they will receive only those scans which intersect the geographic region they defined for that search. Users should note that they will receive a scan in its entirety even if only a portion of that scan lies within their search region.

The state of the dataset's ingestion process.
Possible values are:

• Complete_A: Ingest has completed successfully and the data is of high quality.
• Incomplete: The ingest process is not yet finished.

The GMT date and time that the dataset was ingested. Format is yyyy-mm-dd hh:mm:ss

A unique numerical ID assigned to the dataset for CLASS inventory purposes.

The order option that allows a map of political borders to be drawn on images generated from a dataset.

The latitude of the northernmost pixel of the dataset.

The longitude of the westernmost pixel of the dataset.

The latitude of the southernmost pixel of the dataset.

The longitude of the easternmost pixel of the dataset.

The line number of the northernmost pixel in the dataset. Lines are the index for the vertical axis of a scan.

User option for the format of the output file. Note that Block 11 data is only available in the raw format.

The valid formats are:

• NetCDF - Network Common Data Format
• JPG - image file
• GIF - image file
• AREA - McIDAS data format
• RAW - Native GVAR format

Abbreviation that identifies the satellite that acquired the dataset.

Listed below are the definitions of the abbreviated satellite IDs:

The schedule, or mode of operation, that the satellite was in when it collected the data contained within the given dataset.

Listed below are the definitions of the abbreviated schedule codes:

The line number of the southernmost scanline in the dataset. Lines are the index for the vertical axis of a scan.

The spatial resolution of the dataset, often specified in kilometers (km) and measured at instrument nadir (point directly below the satellite). VIS spatial resolution refers to the spatial resolution of the visible channels, IR spatial resolution refers to that of the infrared channels.

Refers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The latitude of the point on Earth that is directly below the satellite.

The longitude of the point on Earth that is directly below the satellite.

The order preference field that specifies that a line item is to be a geographic subset of the original dataset. When this flag is checked, the user is requesting that the output dataset include a subset of all scans which intersect the user's spatial area specified at the time of their search. Unchecking this option results in a request for the full dataset.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest

The element number of the westernmost pixel of the dataset. Elements are the index for the horizontal x-axis of a scan.

Synonymous with channel number. The channel number, or band, of the instrument that acquired the data. Channel numbers are associated with different wavelengths or ranges of wavelengths within the electromagnetic spectrum, e.g. on GOES, channel 1 is 3900 nm

User option for the data delivery format. Indicates the number of bits to be used to represent each sensor pixel value in the delivery file. Choosing 8 or 16-bits/pixel results in the unpacking of the sensor data and the placing of each pixel value into the indicated number of bits. Note that the sensor data originates in a packed format with each pixel value occupying 10 bits. If 8 is chosen, the original 10-bit raw data is reduced to 8 bits/pixel. If 16 is chosen, the original 10 bits are preserved and are packed into a 16-bit word.

User interface note: Users can specify bits/pixel in the formatting of their extracted data. Selections 8 and 16 are for unpacked extraction and allow users to subsequently specify which channels they wish to receive. If users specify raw data, they will receive all channels in the original 10-bits/pixel format.

The channel number, or band, of the instrument that acquired the data. Channel numbers are associated with different wavelengths or ranges of wavelengths within the electromagnetic spectrum, e.g. on GOES, channel 1 is 3900 nm.

Indicates the geographic area of the dataset. Note that coverage does not apply to B11 data.

Listed below are the definitions of the abbreviated coverage names. I indicates the coverage name is applicable to Imager data. S indicates applicability to Sounder data.

The latitude of the northernmost pixel of the dataset.

The longitude of the westernmost pixel of the dataset.

The latitude of the southernmost pixel of the dataset.

The longitude of the easternmost pixel of the dataset.

The name of the Level 1B data set archived at CLASS. The name has the following format: <Satellite ID>.<Year>.<Julian Day>.<Start Time>

e.g. goes12.2004.148.110923

The size in bytes of the file to be delivered to the user.

Code internal to CLASS for the source of GVAR data.

The element number of the easternmost pixel of the dataset. Elements are the index for the horizontal x-axis of a scan.

The GMT date and time corresponding to the end of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

Checking the subset flag means that, if users perform a non-global spatial search, they will receive only those scans which intersect the geographic region they defined for that search. Users should note that they will receive a scan in its entirety even if only a portion of that scan lies within their search region.

The state of the dataset's ingestion process.
Possible values are:

• Complete_A: Ingest has completed successfully and the data is of high quality.
• Incomplete: The ingest process is not yet finished.

The GMT date and time that the dataset was ingested. Format is yyyy-mm-dd hh:mm:ss

A unique numerical ID assigned to the dataset for CLASS inventory purposes.

The order option that allows a map of political borders to be drawn on images generated from a dataset.

The line number of the northernmost pixel in the dataset. Lines are the index for the vertical axis of a scan.

User option for the format of the output file. Note that Block 11 data is only available in the raw format.

The valid formats are:

• NetCDF - Network Common Data Format
• JPG - image file
• GIF - image file
• AREA - McIDAS data format
• RAW - Native GVAR format

Abbreviation that identifies the satellite that acquired the dataset.

Listed below are the definitions of the abbreviated satellite IDs:

The schedule, or mode of operation, that the satellite was in when it collected the data contained within the given dataset.

Listed below are the definitions of the abbreviated schedule codes:

The line number of the southernmost scanline in the dataset. Lines are the index for the vertical axis of a scan.

The spatial resolution of the dataset, often specified in kilometers (km) and measured at instrument nadir (point directly below the satellite). VIS spatial resolution refers to the spatial resolution of the visible channels, IR spatial resolution refers to that of the infrared channels.

Refers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The latitude of the point on Earth that is directly below the satellite.

The longitude of the point on Earth that is directly below the satellite.

The order preference field that specifies that a line item is to be a geographic subset of the original dataset. When this flag is checked, the user is requesting that the output dataset include a subset of all scans which intersect the user's spatial area specified at the time of their search. Unchecking this option results in a request for the full dataset.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest

The element number of the westernmost pixel of the dataset. Elements are the index for the horizontal x-axis of a scan.

Synonymous with channel number. The channel number, or band, of the instrument that acquired the data. Channel numbers are associated with different wavelengths or ranges of wavelengths within the electromagnetic spectrum, e.g. on GOES, channel 1 is 3900 nm

User option for the data delivery format. Indicates the number of bits to be used to represent each sensor pixel value in the delivery file. Choosing 8 or 16-bits/pixel results in the unpacking of the sensor data and the placing of each pixel value into the indicated number of bits. Note that the sensor data originates in a packed format with each pixel value occupying 10 bits. If 8 is chosen, the original 10-bit raw data is reduced to 8 bits/pixel. If 16 is chosen, the original 10 bits are preserved and are packed into a 16-bit word.

User interface note: Users can specify bits/pixel in the formatting of their extracted data. Selections 8 and 16 are for unpacked extraction and allow users to subsequently specify which channels they wish to receive. If users specify raw data, they will receive all channels in the original 10-bits/pixel format.

The channel number, or band, of the instrument that acquired the data. Channel numbers are associated with different wavelengths or ranges of wavelengths within the electromagnetic spectrum, e.g. on GOES, channel 1 is 3900 nm.

Indicates the geographic area of the dataset. Note that coverage does not apply to B11 data.

Listed below are the definitions of the abbreviated coverage names. I indicates the coverage name is applicable to Imager data. S indicates applicability to Sounder data.

The latitude of the northernmost pixel of the dataset.

The longitude of the westernmost pixel of the dataset.

The latitude of the southernmost pixel of the dataset.

The longitude of the easternmost pixel of the dataset.

The size in bytes of the file to be delivered to the user.

The name of the Level 1B data set archived at CLASS. The name has the following format: <Satellite ID>.<Year>.<Julian Day>.<Start Time>.sndr

e.g. goes12.2004.148.110923.sndr

Code internal to CLASS for the source of GVAR data.

The element number of the easternmost pixel of the dataset. Elements are the index for the horizontal x-axis of a scan.

The GMT date and time corresponding to the end of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

Checking the subset flag means that, if users perform a non-global spatial search, they will receive only those scans which intersect the geographic region they defined for that search. Users should note that they will receive a scan in its entirety even if only a portion of that scan lies within their search region.

The state of the dataset's ingestion process.
Possible values are:

• Complete_A: Ingest has completed successfully and the data is of high quality.
• Incomplete: The ingest process is not yet finished.

The GMT date and time that the dataset was ingested. Format is yyyy-mm-dd hh:mm:ss

A unique numerical ID assigned to the dataset for CLASS inventory purposes.

The order option that allows a map of political borders to be drawn on images generated from a dataset.

The line number of the northernmost pixel in the dataset. Lines are the index for the vertical axis of a scan.

User option for the format of the output file. Note that Block 11 data is only available in the raw format.

The valid formats are:

• NetCDF - Network Common Data Format
• JPG - image file
• GIF - image file
• AREA - McIDAS data format
• RAW - Native GVAR format

Abbreviation that identifies the satellite that acquired the dataset.

Listed below are the definitions of the abbreviated satellite IDs:

The schedule, or mode of operation, that the satellite was in when it collected the data contained within the given dataset.

Listed below are the definitions of the abbreviated schedule codes:

The line number of the southernmost scanline in the dataset. Lines are the index for the vertical axis of a scan.

The spatial resolution of the dataset, often specified in kilometers (km) and measured at instrument nadir (point directly below the satellite). VIS spatial resolution refers to the spatial resolution of the visible channels, IR spatial resolution refers to that of the infrared channels.

Refers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The latitude of the point on Earth that is directly below the satellite.

The longitude of the point on Earth that is directly below the satellite.

The order preference field that specifies that a line item is to be a geographic subset of the original dataset. When this flag is checked, the user is requesting that the output dataset include a subset of all scans which intersect the user's spatial area specified at the time of their search. Unchecking this option results in a request for the full dataset.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest

The element number of the westernmost pixel of the dataset. Elements are the index for the horizontal x-axis of a scan.

The dataset names for all 4 EUMETSAT instruments follows the same basic format.

INSTRUMENT_ID_PRODUCT_TYPE_PROCESSING_LEVEL_SPACECRAFT_ID_SENSING_START_SENSING_END_PROCESSING_MODE_DISPOSITION_MODE_PROCESSING_ TIME_SOME_DATE

Example) IASI_xxx_1C_M02_20070101101500Z_20070101115500Z_N_O_20070101121500Z__20070101121500

Where: INSTRUMENT_ID - 4 characters defining the instrument (ASCA, GOME, GRAS, IASI)
PRODUCT_TYPE - 3 characters defining the type of product (For ASCAT this indicates the resolution - SZF (full), SZR (research - 25KM), SZO (operational 50 KM) for all other instruments: xxx (literally 3 lower case xs)
PROCESSING_LEVEL - 2 characters (1B for ASCAT, GOME, GRAS 1C for IASI) SPACECRAFT_IUD - 3 characters (M02, eventually also M01)
SENSING_START UTC - 15 characters - 14 for the date, one for the Z at the end - (YYYYMMDDHHMMSSZ) SENSING_END UTC- 15 characters - 14 for the date, one for Z at the end (YYYYMMDDHHMMSSZ)
PROCESSING_MODE - 1 character (N (nominal), B (backlog), R (reprocessing), V (verification) ) DISPOSITION_MODE -1 characters (T (testing), O (operational), C (commissioning)
PROCESSING_TIME UTC 15 characters - 14 for the date, one for the Z at the end (YYYYMMDDHHMMSSZ) SOME_DATE -14 characters (No Z at the end) (YYYYMMDDHHMMSS) Total length - 67 defined in documentation + 16 (2 underscores plus some date) = 83 characters

The datatype available is IASI.

Testing

**Operational

Commissioning

The phase or stage that EUMETSAT considers this data to be.  

**Note that data with a disposition mode set to  "Operational" by EUMETSAT may still be considered pre-operational by NOAA.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

The ascending node refers to that portion of the orbit during which the satellite is heading northward. Descending refers to the southbound portion.

Backlog
Nominal
Reprocessing
Validation

The ground station to which data was transmitted for the given data set.

Fairbanks, AK
ReferenceUser Station
SOCC
Svalbard
Wallops Island VA

The number of the orbit (revolution) in which the satellite was traveling at the beginning of the coverage of the given dataset.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The dataset names for all 4 EUMETSAT instruments follows the same basic format.

<INSTRUMENT_ID>_<PRODUCT_TYPE>_<PROCESSING_LEVEL>_<SPACECRAFT_ID>_
<SENSING_START>_<SENSING_END>__<PROCESSING_MODE>_<DISPOSITION_MODE>_<PROCESSING_ TIME>__<SOME_DATE>

Example)  IASI_xxx_1C_M02_20070101101500Z_20070101115500Z_N_O_20070101121500Z__20070101121500
Where:
INSTRUMENT_ID  - 4 characters defining the instrument (ASCA, GOME, GRAS, IASI)
PRODUCT_TYPE  - 3 characters defining the type of product (For ASCAT this indicates the resolution - SZF (full), SZR (research - 25KM), SZO (operational 50 KM);    for all other instruments: xxx (literally 3 lower case x's)  )
PROCESSING_LEVEL - 2 characters (1B for ASCAT, GOME, GRAS;  1C for IASI)
SPACECRAFT_IUD - 3 characters   (M02, eventually also M01)
SENSING_START UTC - 15 characters - 14 for the date, one for the "Z" at the end - (YYYYMMDDHHMMSSZ)
SENSING_END UTC- 15  characters - 14 for the date, one for the "Z" at the end  (YYYYMMDDHHMMSSZ)
PROCESSING_MODE -  1 character   (N (nominal), B (backlog), R (reprocessing),  V (verification) )
DISPOSITION_MODE  -1 characters  (T (testing), O (operational), C (commissioning) )
PROCESSING_TIME UTC 15 characters - 14 for the date, one for the "Z" at the end  (YYYYMMDDHHMMSSZ)
SOME_DATE -14 characters (No Z at the end)   (YYYYMMDDHHMMSS)
Total length - 67 defined in documentation + 16 (2 underscores plus some date) = 83 characters 

The size in bytes of the file to be delivered to the user.

Code internal to CLASS for the source of IASI3X3 data.

A unique numerical ID assigned to the dataset for CLASS inventory purposes.

The ascending node refers to that portion of the orbit during which the satellite is heading northward. Descending refers to the southbound portion.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The name of the data set archived at CLASS. For ancillary files, starting from the second qualifier, all qualifiers identify the data file to which the ancillary files correspond. The name has the following format: Processing-Center.Data-Type.Spacecraft-Unique-ID.Year-Day.Start-Time.Stop-Time.Processing-Block-ID.Source with each qualifier defined below:

The data types available for IJPS Companion Files are:

The GMT date and time corresponding to the end of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The number of the orbit (revolution) in which the satellite was traveling at the end of the coverage of the given dataset.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

Not applicable for IJPS Companion Files.

Not applicable for IJPS Companion Files

Not applicable for IJPS Companion Files

The satellite that acquired the AVHRR data.

The size in bytes of the file to be delivered to the user.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

The number of the orbit (revolution) in which the satellite was traveling at the beginning of the coverage of the given dataset.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

J2AVE
J2CA1
J2CA2
J2CH1
J2CH2
J2MBE
J2ORF
J2OS1
J2OS2
J2PPF
J2VPF

Refers to the time span of interest to the user. This section of the search page allows the user to define
the range of dates/times of interest.

The meaning of times varies within this data family. For GPSP1, the date/time means start time of first data point. Temporal search will be based upon that field. For the TLEs, it means create time, which will be the basis of a temporal search for that type. For the POEs and MOEs, the three times in the file name mean create, start of validity and end of validity. Temporal search will be upon the validity time range.

nrtavs_yyyymmdd_000000.pdf
nrtavs stands for Near Real-Time Altimetry Validation System;
yyyymmdd indicates the year, month and day of the 10-day period covered by the report;
and 000000 indicates that the timestamp of the report is 0 hours GMT.

The ~10 day repeat period of the satellite's orbit. It comprises 254 pole-to-pole passes.

For searching, the user may specify cycle as a positive number or a range of numbers, such as "1-10", "20,40,60", "20-22,30-32", "5,10,15-16,20". 

Definition

Half of an orbital revolution, running from southern-most latitude to northern-most for ascending passes, which are odd numbered; or from northern-most latitude to southern-most for descending passes, which are even numbered.

For searching, the user may specify pass as a positive number or a range of numbers from 1 to 254, such as "10-20", "250,254", "10-20,40", "10-20,40-42", "5,8-10,12". 

The following is commercial freeware Pass Locator Tool is provided by Aviso, as part of the SSALTO ground processing segment. CLASS does not endorse any commercial packages or vendors.

This link is outside of the CLASS domain. You may wish to check their privacy policy.

Pass Locator Tool by Aviso. 

The user may specify a time interval for searching using either date and time, OR a range of cycles.  To search by date and time, click on the "Date" radio button, then enter the desired Start Date, Start Time, End Date, and End Time.  To search by cycle, click on the "Cycle" radio button, then enter the cycle number or range of numbers.  Only one of these temporal search methods can  be used per search. 

The user may also specify a set of passes to search for within the time interval, for either a date and time search or a cycle range search. If no specific passes are  requested, all 254 passes per cycle will be included in the search.

File Naming convention has the following format:

<PROCESSING-CENTER>.<PROJECT-ID>.<VERSION>.<PRODUCT-TYPE>.<SENEOR-ID>.<SPACECRAFT_ID>.<YEAR-DAY>.<START-TIME>.<STOP-TIME>.< PROCESSING-BLOCK-ID>.<SOURCE>.<FILE-TYPE>

Where:

PROCESSING-CENTER = Processing-Center where the data were created. Length: 3 char. Domain:
“NPR” = NOAA/NESDIS Product – Suitland, Maryland, USA

PROJECT-ID = I dentifies the project name. Length: 4 Char. Domain:
"MIRS" = Microwave Integrated Retrieval System (fixed)

VERSION =  The product's algorithm version number Length: 2 char. Domain:
"VO" to "V3"

PRODUCT-TYPE = Identifies the type of product. length: 3 char. Domain:

"SND" = Sounding-type products.
"IMG" = 2-dimensional surface and precipitation type products.

Note that the fimename convention covers two types of products, and each type includes a suite of individual products. For example, the "SND" file will contain three sounding profiles: T(z), Q(z), and Hy(Z), and the "IMG" file will contain 9 integrated and surface products: TPW, CLW, RR, SWE, Snow,Cover, Sea Ice, LSE, LST and IWP. This approach allows onefile to store duplicate geolocation and other auxiliary data for each individual product type.

SENSOR-ID = Short Name for the instrument used to derive the product. Length 4 to 5 char. domain:
"AAMH" = derived fromcombined AMSU-A and MHS data on POES/MetOp spacecraft.
"SSMIS" = derived from SSMIS data on DMSP.
"ATMS" = derived from ATMS data on NPP/NPOES

SPACECRAFT_ID = Spacecraft-Unique-ID. Length: 2 char. Domain:
"NN" = NOAA-18 (NOAA-N)
"SA" = DMSP Air Force F16
"SB" = DMSP Air Force F17
"M2" = MetOp-2

YEAR-DAY = Year-Day. E.g. “D79104”, where “D” identifies this group as a Julian day delimiter, “79” identifies the year in which the spacecraft began recording the data set and “104” identifies the Julian day on which the spacecraft began recording the data set. Length: 6 char. (5 characters for the date string, plus one for the “D” at the beginning). Domain: “D”+”YYJJJ”

START-TIME = e.g. “S1355”, where “S” identifies this group as a start time delimiter. “1355” denotes 13 hours 55 minutes UTC (to the nearest minute) and represents the time at which spacecraft recording began. Length: 5 char. (4 characters for the time string, plus one for the “S” at the beginning). Domain: “S”+”HHMM”

STOP-TIME = e.g. “E1456”, where “E” identifies this group as an end time delimiter. “1456” denotes 14 hours 56 minutes UTC (to the nearest minute) and denotes the time of spacecraft recording of the last usable data in the data set. Length: 5 char. (4 characters for the time string, plus one for the “E” at the beginning). Domain: “E”+”HHMM”

PROCESSING-BLOCK-ID = e.g. “B0016465”, where “B” identifies this group as a processing block ID delimiter. “0016465” is a seven digit number identifying the spacecraft revolution (orbit) in which recording of this data set began and the revolution in which the recording of the data set ended (the first five digits identifying the beginning revolution and the last two being the two least significant digits of the ending revolution). Length: 8 char. (7 characters for the orbit number, plus one for the “B” at the beginning). Domain: “B”+”XXXXXXX”

SOURCE = Identifies the data acquisition source. Length: 2 char. Domain:
“NS” = Fixed field designating No Station.

FILE-TYPE = File extension that indicates file type. Length: variable. Domain: “hdf”, “he4”, “netcdf”, “bin”, etc.

Filename example:
NPR.MIRS.V0.SND.AAMH.NN.D07077.S0855.E1030.B0940405.NS.he4

The data types available for MIRS are:

1.  MIRS AMSU-A/MHS Orbital Level-2 Sounding Products HDF-EOS Format:  AAMHSNDHE
2.  MIRS AMSU-A/MHS Orbital Level-2 Precipitation and Surface Products HDF-EOS Format: AAMHIMGHE

The GMT date and time corresponding to the end of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

Not applicable to this Datatype.

Not applicable to this Datatype.

The satellite that acquired the MIRS Orbital data.

MetOp            M02
NOAA18        N18
DMSP Air Force F16
DMSP Air Force F17

The size of the file to be delivered to the user in bytes.

The number of the orbit (revolution) in which the satellite was traveling at the beginning of the coverage of the given dataset.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The name of the MSPPS mapped data set archived at CLASS. The name has the following format: Processing-Center.Data-Type.Spacecraft-Unique-ID.Year-Day with each qualifier defined below:

The size in bytes of the file to be delivered to the user.

Code internal to CLASS for the source of MSPPS (Microwave Surface and Precipitation Product System) mapped data.

A unique numerical ID assigned to the data set for CLASS inventory purposes.

Currently not applicable to MSPPS mapped data.

Currently not applicable to MSPPS mapped data.

The satellite that acquired the data from which the MSPPS mapped product was created.

Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.

The GMT date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.