The ADA file has all of the raw pointing information available from the S/C. It includes 8 Inertial Reference Unit (IRU) values per major frame (a MF covers 2 sec in high rate), 4 Geomagnetic Attitude Sensor (GAS) values per MF, 4 Two-Dimensional Fine Sun Sensor (TFSS) values per MF, 4 Non-Spin Type Attitude Sensor (NSAS) per MF, Star Tracker (STT) information, and 2 HXT 2-D Aspect Sensor (HXA) values per MF. The data should be in one of the YDn data directories.
The ATR file (eg: atr92_26a.01) has one dataset per major frame for each non-night major frame of data available. Each dataset has the single IRU, TFSS, and HXA values for that major frame, along with the DP mode and DP rate. The data are in the $DIR_GEN_ATR directory.
The ATT file contains the reduced S/C attitude information. The sun center position is derived for each non-night major frame using the IRU and HXA data. The coordinate system used is the center SXT pixel of the sun. The mainframe ground derived attitude determination software (ADS) results for the S/C roll are also written into the ATT file. The data are in the $DIR_GEN_ATT directory.
The BDA files contain the raw reformatted BCS data. The data should be in one of the YDn data directories.
The BSD file is produced by the F77 program MKBSD. It consists of spectra extracted from the BDA file, with instrument corrections applied.
BPC is an intermediate file which contains fit information derived by the F77 program BSDCAL that is used by the F77 program BSDFIT as a first guess for a comparison with synthetic spectra
BTH contains parameters describing the synthetic spectral fit performed by the F77 program BSDFIT to the observations.
BFT contains synthetic spectra created during the fit performed by the F77 program BSDFIT.
The BSC file is produced by the IDL routine MK_BSC. It consists of spectra extracted from the BDA file, with instrument corrections applied.
BSA is a control file that can be created when preparing to run the IDL routine MK_BSC. The information in this file is contined within the BSC file after it has been generated.
BSF files contain fit information derived by FIT_BSC when making synthetic spectra.
The CBA file contains a full copy of the Basic Part for every major frame of the telemetry. The Basic Part is the first 4 columns of the telemetry minor frame and consists of 1/4 of all of the telemetry. The relevant instrument data are extracted from this part and put into the instrument files. The data should be in one of the YDn data directories.
The EVN file contains an entry for every time there is a change in DP mode (Quiet/Flare) or when there is a gap in continuous data of more than one minute. The entry contain information about how many images and spectra are available for each instrument during that period, the peak counts for each channel of the instruments, and the location of the SXT PFI. The data are in the $DIR_GEN_EVN directory.
The FEM file has a dataset for each time the S/C has a night to day transition. The times of any SAA passages and station contacts are also saved in these files. The files are created using the orbital solutions which are derived weekly by NASDA. The data are in the $DIR_GEN_FEM directory.
The GEV file contains the start, stop and peak times of a flare event, the GOES classification, the H-alpha importance level, the location in heliocentric coordinates, the NOAA active region number, and the radio fluxes. This binary file is created from the SELSIS/NOAA text event files. The data are in the $DIR_GEN_GEV directory.
The GXT file contains the one minute average count rate for the GOES-6 and GOES-7 low and high energy channels. This binary file is created from the tektronics plot files. The data are in the $DIR_GEN_GXT directory.
G6D files hold the digital raw (unprocessed) three second light curve data for the GOES-6 spacecraft. The data are in the $DIR_GEN_G6D directory.
G7D files hold the digital raw (unprocessed) three second light curve data for the GOES-7 spacecraft. The data are in the $DIR_GEN_G6D directory.
GXD file is generated from the G6D and G7D files and has information similar to the GXT file. ** Not Available (Oct-93) **
The GBE file contains information on BATSE flare events. It contains the start time, peak time, end time, BATSE event number, peak counting rate, and total counts detected. There were approximately 3880 events between 1-May-91 and 1-Apr-93 The data are in the $DIR_GEN_GBE directory.
The GBL file contains the light curves for BATSE flare events. There were approximately 3880 events between 1-May-91 and 1-Apr-93 The data are in the $DIR_GEN_GBL directory.
The Nobeyama polarized radio images (GNP) are copied daily to the ISAS Yohkoh database. The images are scaled from REAL data type into BYTE type to save space. A single image per day is available after Apr-93.
The Nobeyama total intensity radio images (GNT) are copied daily to the ISAS Yohkoh database. The images are scaled from REAL data type into BYTE type to save space. A single image per day is available after Apr-93.
The GOL file contains an entry for each GBO image available, with the date/time of the image, the site, the image type, and a variety of other information. The data are in the $DIR_GEN_GOL directory.
The HDA files contain the raw reformatted HXT data. The data should be in one of the YDn data directories.
The MDM file contains the information on which raw orbital reformatted data files are written to which magneto-optical (MO) disk. The MDM file is saved using SAVGEN. The data are in the $DIR_GEN_MO directory.
The NAR file contains the NOAA active region number, the location in heliocentric coordinates, the longitude of active region, the area of the active region in millionths, the MacIntosh classification, the longitude extent in degrees, the number of spots and the magnetic type. The binary file is is created from the SELSIS/NOAA text region files. The data are in the $DIR_GEN_NAR directory.
The NEL file simply tells the user the hours of each day when the Nobeyama Radio Observatory was observing. The data are in the $DIR_GEN_NEL directory.
The NTS file has the time series of correlation coefficients for the Nobeyama Radio Observatory. The data are in the $DIR_GEN_NTS directory.
The observing log (OBS) for all instruments used to be combined in a single OBS file. In mid-1993 the entries were broken into separate files for more efficiency.
The BCS observing log (OBD) contains an entry for each BCS spectrum (no more than one every 4 seconds). The entry is created from the roadmap and DP sync structures. Information on the instrument modes and the counting rates are available. Light curves or seaches for certain observing modes can be performed using this log. The data are in the $DIR_GEN_OBD directory.
The SXT full frame observing log (OSF) contains an entry for each full frame image taken. The entry is a copy of the roadmap and contains information on the DP mode, filter user, exposure level, average and peak DN level, and other information. The data are in the $DIR_GEN_OSF directory.
The SXT parital frame observing log (OSP) contains an entry for each partial frame image taken. The entry is a copy of the roadmap and contains information on the DP mode, filter user, exposure level, average and peak DN level, and other information. The data are in the $DIR_GEN_OSP directory.
The WBS and HXT observing log (OWH) are combined together. There is an entry for every 2 major frames. The entry is created from the roadmap structure of each instrument. Information on the instrument modes, as well as the counting rates are available in each entry. Light curves or searches for certain observing modes can be performed using the observing log. The data are in the $DIR_GEN_OWH directory.
The PNT database was replaced by the ATR and ATT databases in mid-1993. The ATR database holds the raw spacecraft attitude data and the ATT database holds the processed attitude information.
The SDL file contains the histogram for every dark image which is taken. From the histograms, the average signal and standard deviation can be calculated. The DN value and location of the 128 brightest dark spikes is also available for every dark image taken. These are non-image data. The data are in the $DIR_SXT_SDL directory.
The SDC file contains the reference dark images to be used for background subtraction when the CCD is cooled to -21 C. The data are in the $DIR_SXT_SDC directory.
The SDW file contains the reference dark images to be used for background subtraction when the CCD is not cooled. A separate image is saved for every unique temperature. The data are in the $DIR_SXT_SDW directory.
The SFD files (eg: sfd92_25a.03) are the SXT full-frame desaturated images (combination of long and short exposures to eliminate saturation spikes on the CCD). The two exposures must be taken less than 10 minutes apart, be complete, and not taken during earth eclipse. The background is subtracted using the nearest available suitable dark frame and the exposures and resolutions are normalized. The data are in the $DIR_SXT_SFD directory.
The SFR file is the raw data file which contains the full-frame images. The final SFR files are a single file per orbit, but the temporary files can span more than an orbit. The data should be in one of the YDn data directories.
The SFS database contains all images taken in compressed mode using the diffuser, UV flood, or open filter positions. The data are in the $DIR_SXT_SFS directory.
The SFT file contains all of the sunset images. These are images taken as the S/C goes behind the earth, and the earth's atmosphere attenuates all the X-rays, leaving a good calibration image of the pin hole and light leak caused by the Nov-92 entrance filter failure.
The SFW file contains all complete optical images for the week.
The SFC file contains reference calibration images to be used to correct for the scatter and pin hole leak that occurred in Nov-92. The data are in the $DIR_SXT_SFC directory.
The SFM file contains a single SFD image for every day of the month centered as close to 12:00 UT as possible. The data are in the $DIR_SXT_SFM directory.
The SLS file contains information on the scattered light signal as seen through the narrow band filter, DPE=2, dark image. The database was created after the Nov-92 entrance filter failure. These are non-image data. The data are in the $DIR_SXT_SLS directory.
The SLD file contains information on the dark current signal level as seen in the DPE=13 dark images. The database was created after the Nov-92 entrance filter failure. These are non-image data. The data are in the $DIR_SXT_SLD directory.
The SPR file is the raw data file which contains the parital-frame images. The final SPR files are a single file per orbit, but the temporary files can span more than an orbit. The data should be in one of the YDn data directories.
The SOT files contain the information on the location of the center of the sun on the CCD, as well as the signal level detected, for every complete optical image available. This database allows the tracking of the optical telescope degradation. These are non-image data. The data are in the $DIR_SXT_SOT directory.
The SSC files contain a narrow strip extracted from the SFD images which can be processed to make a synoptic image of the sun. The weekly files are simply narrow strips, but the carrington rotation files are assembled synoptic maps. The data are in the $DIR_SXT_SSX or $DIR_GEN_SYNOPTIC directory.
The SSE files contain a narrow strip extracted from the SFD images which can be processed to make a synoptic image of the sun. The weekly files are simply narrow strips, but the carrington rotation files are assembled synoptic maps. The data are in the $DIR_SXT_SSX or $DIR_GEN_SYNOPTIC directory.
The SSW files contain a narrow strip extracted from the SFD images which can be processed to make a synoptic image of the sun. The weekly files are simply narrow strips, but the carrington rotation files are assembled synoptic maps. The data are in the $DIR_SXT_SSX or $DIR_GEN_SYNOPTIC directory.
The SSL file contains information on the minimum, maximum, and average exposure duration measured for every exposure level for the week, information on the serial numbers and number of PFI and FFI images taken in quiet and flare mode. It tracks the number of exposures through each filter and the total exposure through each filter. It also has the average and maximum signal through the WBS-SXS, WBS-RBM, and HXT-Low channels. It tracks the min, max, and avg temperature for the 15 SXT temperature sensors. These are non-image data. The data are in the $DIR_SXT_SSL directory.
The SXC file is simliar to the SOT file, but for X-ray images. It takes each one of the SFD images and uses the routine SXT_CENTER to find the center of the sun. These are non-image data. The data are in the $DIR_SXT_SXC directory.
The SXL file contains a histogram for every SFD image taken. From the histogram, the average signal for the whole sun can be calculated and the solar flux can be plotted for the whole mission. These are non-image data. The data are in the $DIR_SXT_SXL directory.
The SXA file contains the average flux for 50 vertical bands from the SFD images. This database can be used to evaluate the amount of X-ray dose the CCD is exposed to as a function of postion E-W. These are non-image data. The data are in the $DIR_SXT_SXA directory.
The WDA files contain the pulse count (PC) as well as the pluse height (PH) (spectral) data taken by the WBS instruments. The data should be in one of the YDn data directories.
The XAD file contains information about what data are contained on each Exabyte tape. The file format is ASCII. The data are in the $DIR_GEN_XAD directory.
The XBD file contains information about what data are contained on each Exabyte tape. The file format is binary. The data are in the $DIR_GEN_XBD directory.