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Summary
ABSTRACT: The ionosphere is that part of the Earth's atmosphere that
results mainly from the ionizing effect of Solar electromagnetic
radiation. For poleware latitudes, the ionizing effect of incident
energetic particles is also significant. Traditionally, the following
ionospheric regions and their approximate height ranges have been
designated: D region ... (60-90 km); E region (90-150 km); F1 region
(150-250 km); and F2 region (above 250 km). Ionosondes utilize the
radio wave-reflecting properties of the ionosphere. The product of
the speed of light in a vacuum and half the elapsed time between
vertical transmission of a single frequency electromagnetic wave and
reception of the reflected wave at the transmitting location is
defined as the virtual height of that frequency. A sweep-frequency
ionogram is a plot of virtual height versus frequency and is recorded
as nearly instantaneously as possible. These ionospheric data consists
mainly of hourly values for at least one to a maximum of all of the
following ionospheric characteristics (parameters). They are foF2,
M(3000)F2, hF2, foF1, M(3000)F1, hF, foE, hE, foE2, hE2, foEs, fbEs,
hEs, fmI, and fxI. The values are five byte (character) fields. The
first three bytes of the field are reserved for a numeric value; the
last two bytes are reserved for the qualifying and descriptive letter,
if present. There are no decimals encoded in these data. Documentation
is supplied with each data order. Data are archived on CDROM, optical
disk, and magnetic tape. There are two CD-ROM's sold as a set. One
contains 1957 - 1975 data; the other contains 1976-1990 data. The
CDROM contains ASCII files and runs on DOS-compatible machines. A
catalog, which lists the contents of the CDROM data set, is available
via anonymous FTP.ngdc.noaa.gov and GOPHER.ngdc.noaa.gov in the
/STP/IONOSPHERE/CATALOG directory. Additional data are available, but
have not yet been put on CDROM. Data are also available on magnetic
tape and IBM compatible diskette. U.S. Department of Commerce NOAA,
NESDIS E/GC2 National Geophysical Data Center and World Data Center -
A 325 Broadway Boulder, CO 80303-3328 USA FAX:303-497-6513
Internet:info@mail.ngdc.noaa.gov Phone:303-497-6414 Raymond
O. Conkright

PURPOSE: Ionospheric Research

SUPPLEMENTAL INFORMATION: Observing station type: Solar-Terrestrial
Observatory. Data collection type: Network. Number of sites: 59
observatories. Processing: These data are archived by year in the
following order: year, ionospheric station, month, ionospheric
characteristic, followed by the hourly values of the ionospheric
characteristic for all days of the month and then by the monthly
statistical data (median data) for that ionospheric characteristic.

CURRENTNESS REFERENCE: Ground Condition

Geographic Coverage Spatial coordinates   

N: 90.0

S: -90.0

E: 180.0

W: -180.0

Data Set Citation

Dataset Creator: National Geophysical Data Center (comp) Dataset Title: Worldwide Hourly Values of Ionospheric Characteristics: foF2, M(3000)F2, hF2,FoF1, M(3000)F1, hF, FoE, hE, foE2, hE2, foEs, fbEs, fmI, and FxI Dataset Series Name: Solar-Terrestrial Physics (STP) Working Document Dataset Release Date: 1973 Dataset Release Place: Boulder, CO Dataset Publisher: National Geophysical Data Center Version: First Issue Identification: 'Working Document' Online Resource: http://www.ngdc.noaa.gov/stp

Temporal Coverage

Start Date: 1942-01-01

Location Keywords

GEOGRAPHIC REGION > GLOBAL

Science Keywords

SUN-EARTH INTERACTIONS > SOLAR ENERGETIC PARTICLE PROPERTIES > PARTICLE DENSITY

Platform

SATELLITES GROUND STATIONS

Instrument

IONOSONDE

Project

CGC > NOAA Climate and Global Change Program ESIP > Earth Science Information Partners Program

Access Constraints
ACCESS CONSTRAINTS: No Constraints

DISTRIBUTION LIABILITY: Disclaimer While every effort has been made to
ensure that these data are accurate and reliable within the limits of
the current state of the art, NOAA cannot assume liability for any
damages caused by any errors or omissions in the data, nor as a result
of the failure of the data to function on a particular system. NOAA
makes no warranty, expressed or implied, nor does the fact of
distribution constitute such a warranty.

CUSTOM ORDER PROCESS: Contact data center for information

Use Constraints
None

Ancillary Keywords

Ionosonde Ionospheric Parameters Global Bottomside Vertical Incidence Ionosonde

Data Set Progress

IN WORK

Data Center

National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Data Center URL: http://www.ngdc.noaa.gov/ Dataset ID: ______IONOSPHERE ____ Data Center Personnel Name: RONALD W. BUHMANN Phone: 303-497-6128 Fax: 303-497-6513 Email: Ronald.W.Buhmann at noaa.gov Contact Address: NOAA/NESDIS/NGDC E/GC1 325 Broadway City: Boulder Province or State: CO Postal Code: 80305-3328 Country: USA World Data Center for Solar-Terrestrial Physics, Boulder Data Center URL: http://www.ngdc.noaa.gov/stp/ Data Center Personnel Name: DIRECTOR, WDC/STP, BOULDER Phone: 303-497-6323 Email: ngdc.wdcastp at noaa.gov Contact Address: 325 Broadway City: Boulder Province or State: CO Postal Code: 80305 Country: USA

Distribution

Distribution Size: 5813.000000 Distribution Format: ASCII Fees: Depends on the Data Set

Personnel

RONALD W. BUHMANN Role: TECHNICAL CONTACT Phone: 303-497-6128 Fax: 303-497-6513 Email: Ronald.W.Buhmann at noaa.gov Contact Address: NOAA/NESDIS/NGDC E/GC1 325 Broadway City: Boulder Province or State: CO Postal Code: 80305-3328 Country: USA ROB REDMON Role: DIF AUTHOR Phone: 303-497-4331 Fax: 303-497-6513 Email: Rob.Redmon at noaa.gov Contact Address: NOAA/NESDIS/NGDC 325 Broadway City: Boulder Province or State: CO Postal Code: 80305 Country: USA

Related URL

Link: GET DATA Link: GET DATA Link: GET DATA Link: VIEW EXTENDED METADATA Description: View Source Metadata document from the Metadata Manager and Repository (NMMR). Link: VIEW RELATED INFORMATION

Creation and Review Dates

DIF Creation Date: 2007-02-22 Last DIF Revision Date: 2007-04-12

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