/* This structure describes the format of the */ /* data record of the selected roll reference (SRR) epoch file of the */ /* Pioneer Venus Orbiter (PVO) Supplementary Experimental Data Record */ /* (SEDR). The following is an overview in tabular form of the SRR epoch */ /* data record: */ /* */ /* +----+----------------------------------------+ */ /* | |BITS --> | */ /* +----+----------------------------------------+ */ /* | | 111 1111 1112 2222 2222 2333 | */ /* | |1234 5678 9012 3456 7890 1234 5678 9012 | */ /* +----+----------------------------------------+ */ /* |WD 1| YEAR OF DATA | DOY OF DATA | */ /* | 2| MILLISECONDS (S/C UT) OF SRR EPOCH DATA| */ /* | 3| (SPARE) | */ /* | 4| (SPARE) | */ /* | 5| CELESTIAL LATITUDE OF PULSE STAR | */ /* | 6| CELESTIAL LONGITUDE OF PULSE STAR | */ /* | 7| ERROR IN SIMULATED SRR VALUE | */ /* | 8| (SPARE) | */ /* | 9| (SPARE) | */ /* | 10| (SPARE) | */ /* +----+----------------------------------------+ */ /* */ /***************************************************************************/ /* Table format description begins here. */ /***************************************************************************/ OBJECT = COLUMN NAME = "YEAR OF SPACECRAFT SRR EPOCH DATA" DATA_TYPE = "MSB INTEGER" START_BYTE = 1 BYTES = 2 DESCRIPTION = "This object contains the four digit year in spacecraft universal time for the PVO spacecraft SRR epoch record." END_OBJECT = COLUMN /* Changed NOTE to DESCRIPTION throughout file. */ OBJECT = COLUMN NAME = "DAY OF YEAR OF SPACECRAFT SRR EPOCH DATA" DATA_TYPE = "MSB INTEGER" START_BYTE = 3 BYTES = 2 DESCRIPTION = "This object contains the three digit day of year in spacecraft universal time, ranging from 1 to 366, for the PVO spacecraft SRR epoch record." END_OBJECT = COLUMN OBJECT = COLUMN /*Column name too long >40 */ NAME = "MILLISEC OF DAY OF SC SRR EPOCH DATA" DATA_TYPE = "MSB INTEGER" START_BYTE = 5 BYTES = 4 NOTE = "This object contains the milliseconds of the day in spacecraft universal time, where midnight is 0.00, for the PVO spacecraft SRR epoch record." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SPARE1" DATA_TYPE = "IBM REAL" START_BYTE = 9 BYTES = 4 DESCRIPTION = "This object contains a spare (empty) value." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SPARE2" DATA_TYPE = "IBM REAL" START_BYTE = 13 BYTES = 4 DESCRIPTION = "This object contains a spare (empty) value." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "CELESTIAL LATITUDE OF PULSE STAR" DATA_TYPE = "IBM REAL" START_BYTE = 17 BYTES = 4 DESCRIPTION = "This object contains the celestial latitude, measured in degrees, of the star used to generate a spacecraft pulse time when the SRR pulse is using star synchronization." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "CELESTIAL LONGITUDE OF PULSE STAR" DATA_TYPE = "IBM REAL" START_BYTE = 21 BYTES = 4 DESCRIPTION = "This object contains the celestial longitude, measured in degrees, of the star used to generate a spacecraft pulse time when the SRR pulse is using star synchronization." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ERROR IN SIMULATED SRR EPOCH" DATA_TYPE = "IBM REAL" START_BYTE = 25 BYTES = 4 DESCRIPTION = "This object contains an estimate of the time difference, measured in seconds, between an SRR pulse using simulated synchronization and an estimate of the corresponding sun pulse." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SPARE3" DATA_TYPE = "IBM REAL" START_BYTE = 29 BYTES = 4 DESCRIPTION = "This object contains a spare (empty) value." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SPARE4" DATA_TYPE = "IBM REAL" START_BYTE = 33 BYTES = 4 DESCRIPTION = "This object contains a spare (empty) value." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SPARE5" DATA_TYPE = "IBM REAL" START_BYTE = 37 BYTES = 4 DESCRIPTION = "This object contains a spare (empty) value." END_OBJECT = COLUMN