CCSD3ZF0000100000001NJPL3IF0PDSX00000001 /* FILE: EUV90342_NOD31.LBL */ /* VERSION 1.0: 15-MAY-1998 SIMMONS */ PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 1200 FILE_RECORDS = 1436 PRODUCT_ID = "EUV90342_NOD31.DAT" PRODUCT_NAME = "E190342NOD31 EDR DATA" DATA_SET_ID = "GO-E-EUV-2-EDR-EARTH1-V1.0" OBSERVATON_ID = "E190342NOD31" SPACECRAFT_NAME = "GALILEO ORBITER" INSTRUMENT_NAME = "EXTREME ULTRAVIOLET SPECTROMETER" MISSION_PHASE_NAME = "EARTH1 ENCOUNTER" TARGET_NAME = "EARTH" PRODUCT_CREATION_TIME = 2-JUN-1993 START_TIME = 1990-341T23:59:36.781Z STOP_TIME = 1990-343T00:00:26.781Z SPACECRAFT_CLOCK_START_COUNT = 608994:00:0 SPACECRAFT_CLOCK_STOP_COUNT = 610419:00:0 ^SPECTRUM = "EUV90342_NOD31.DAT" DESCRIPTION = " This file was produced by the Galileo EUV/EUV team at the Laboratory for Atmospheric and Space Physics (LASP) at the University of Colorado at Boulder. The data contained in the file were obtained by the EUV instrument during the Earth 1 encounter. /* The analysis of some of these raw data has been published in Ajello,J. M, W. R. Pryor, C. A. Barth, C. W. Hord, K. E. Simmons, Solar Wind Latitude Variations and Multiple Scattering from Galileo Interplanetary Lyman-a Observations, Advances in Space Research, Vol 13, No6, pp(6)37-(6)40, 1993 and the paper Ajello, Joseph M., W.R. Pryor, C.A. Barth, C.W. Hord, A.I.F. Stewart, K.E. Simmons, D.T.Hall, Observations of Interplanetary Lyman-a with the Galileo Ultraviolet Spectrometer: Multiple Scattering effects at Solar Maximum, Astronomy and Astrophysics, 289,283-303,1994. The EUV data in this file were obtained using the original EUV 'encounter mode'. Calibrations to physical units have not been made so the data are in units of 'raw counts'. TORUS1:[GLL_RAW.INFO]EDR_HEADER_PHASE1.DOC;4 Revision date: 26 May 1993 by JSC 8 Sept, 95 - KES Revision date: 31-MAY-1996 JJG EUV Phase 1 File headers: The following list documents the contents of the header information located at the beginning of the EUV data records. All values and reference locations are INTEGER*2 (two byte integers) unless otherwise specified. (In an EUV file, you may associate to an Integer*2 to read the header and revert to a byte associate for the data.) Index Values in IDL 00 ERT Year (last 2 digits only) 01 Day of Year 02 Hour 03 Minute 04 Second 05 MSecond SCE Year - see 34 below !Added Feb 13 (?yr?) 06 Day of Year 07 Hour 08 Minute 09 Second 10 MSecond 11 Format FID in low 5 bytes;Time flags in top Spacecraft Clock 12 RIM top byte (Construct RIM with [top*256.]+bottom) 13 RIM Least Signifcant two bytes (bottom) 14 MOD 91 15 MOD 10 (=RTI) 16 MOD 8 17 SCLK Flags 18-28 Data Presence Indicators (0=OK,1=absent,one flag/minor frame) 29 Top 3 bits are final DPIs; bottom (LSB) bit is P/B flag 30 Spare 31 Source indicator (-2=no data (lasp), -1=no data,partial (EDR), 1=certified, 2=manipulated at LASP) 32 Software version number (integer*1000=j.iii) (will be less than 10,000 for phase 1 data files) 33 spare 34 SCE Yr (see above) 35 spare 36 spare 37# spare 38# EUV:=0 39 EUV:=0 ###Nov25,96 58-585 data Max value is F-Channel: 15-bit word decompressed 586-599# 12 AACS values + 2 spares End A diagram of the file and record structure is shown below: |-----+---------------+---------------------| 1 |time | S1 | spare | d | SPECTRUM |-----+---------------+---------------------| . 2 |time | S1 | spare | d | . |-----+---------------+---------------------| . 3 |time | S1 | spare | d | . |-----+---------------+---------------------| . . . . . . repeats 36 times . . . . . . . |-----+---------------+---------------------| . 40 |time | S1 | spare | d | SPECTRUM |-----+---------------+---------------------| |40 2-| / \ / \ / \ |byte | / 546 \ / 14 \ / 2 \ |spare| /spectra\ / 2- \ / byte\ |or | / (S) \ / byte \ / record\ |time | / 2-byte \/ spare \/delimiter\ |tag |/ values \ Records 1 to ij are data records. Each record begins /* header containing 40 2-byte integer numbers. The definition of these header values are futher described in the Galileo Document 625-610. The data start at byte 81, following the header information. Each record contains one full-wavelength spectra. The 14 spectra per RIM are controlled such that the EUV detector used to count photons switches back and forth as such: F,G,F,G,F,G,F,G,F,G,F,G,F,G. Also, if engineering value 12 is greater than 100 DN then the spectra is an F-channel spectra. If engineering value 14 is greater than 100 DN then the spectra is a G-channel spectra. The spectrum contains 546 2-byte integer numbers. There are then 14 2-byte values (=0). Each record ends with a 2-byte VAX record delimiter. Note: The playback of IDA data was very fragmentary. " OBJECT = SPECTRUM NAME = "1 EUV SPECTRA" INTERCHANGE_FORMAT = BINARY ROWS = 1436 COLUMNS = 43 ROW_BYTES = 1200 ^STRUCTURE = "SPECTRUM.FMT" DESCRIPTION = " The spectrum data table consists of 40 2-byte integers of time tag (RIM, yr, doy, hr, min, sec, spares ...), 546 spectral values for the spectra, 14 2-byte spares, and a record delimiter character. The record structure is 80 bytes of timetag, a (1, 546) array of 2-byte integers containing the 546 spectral values for the spectra, 14 2-byte spares, and a 2-byte VAX record delimiter." END_OBJECT = SPECTRUM END