PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 115 FILE_RECORDS = 170 ^TABLE = "G_DATA.TAB" DATA_SET_ID = "GO-J-NIMS-4-ADR-SL9IMPACT-V1.0" SPACECRAFT_NAME = GALILEO_ORBITER MISSION_PHASE_NAME = "SHOEMAKER-LEVY 9 ENCOUNTER" TARGET_NAME = JUPITER OBSERVATION_NAME = SLJNFRAGMG01 NOTE = "NIMS observation of impact of G fragment of comet Shoemaker-Levy 9 with Jupiter // Raw data numbers versus time for the Jupiter pixels containing the impact site of the G fragment of comet Shoemaker-Levy 9. These data are extracted from NIMS Experiment Data Records (EDRs) for the SL-9 Impact, archived on CD-ROM volume GO_1004." START_TIME = 1994-199T07:02:26Z STOP_TIME = 1994-199T07:13:11Z SPACECRAFT_CLOCK_START_COUNT = 2486477.17 SPACECRAFT_CLOCK_STOP_COUNT = 2486487.74 PRODUCT_ID = "G_DATA.TAB" PRODUCT_CREATION_TIME = 1995-11-19 INSTRUMENT_NAME = "NEAR INFRARED MAPPING SPECTROMETER" INSTRUMENT_ID = NIMS INSTRUMENT_MODE_ID = FIXED_MAP GAIN_MODE_ID = 2 CHOPPER_MODE_ID = 'REFERENCE' START_GRATING_POSITION = 2 OFFSET_GRATING_POSITION = 4 GRATING_POSITION_INCREMENT = 0 GRATING_POSITIONS = 1 OBJECT = TABLE INTERCHANGE_FORMAT = ASCII ROWS = 170 COLUMNS = 21 ROW_BYTES = 115 OBJECT = COLUMN NAME = CROSSING_NUMBER DESCRIPTION = "As the spacecraft scan platform scanned across Jupiter's position, the impact site (the morning hemisphere) was generally contained within one, and sometimes two, NIMS mirror scans. For each scan, two pixels are illuminated, due to overlap in the spatial response. The 'crossing number' identifies each scan: even crossing numbers correspond to night to dayside scans, odd numbers the reverse. Some crossings are missing due to transmission problems or instrument cycling or limited playback time. Occasionally the same crossing will appear twice, due to overlap in the scan platform scan pattern. In some cases, the signal is clearly weaker due to decreased responsivity at the edge of the field, but is retained for relative spectral information." DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 3 END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPACECRAFT_CLOCK_COUNT_RIM DESCRIPTION = "The Spacecraft Clock Realtime IMage count (RIM) of the current record. The RIM count is incremented every 60 2/3 seconds. It contains 91 minor frames or MOD91 counts." DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 10 END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPACECRAFT_CLOCK_COUNT_MOD91 DESCRIPTION = "The Spacecraft Clock MOD91 count (minor frame) of the current record. The MOD91 count is incremented every 2/3 second, and assumes 91 values, 0 to 90, within each RIM. Since there are two mirror scans per minor frame, and Jupiter appears in the center of the scan, .25 or .75 has been added to the MOD91 count as appropriate." DATA_TYPE = REAL START_BYTE = 16 BYTES = 6 END_OBJECT = COLUMN OBJECT = COLUMN NAME = NIMS_MIRROR_POSITION DESCRIPTION = "The NIMS secondary mirror scans through 20 positions, designated 0-19. During the SL-9 impact, Jupiter appears mainly in the central mirror positions 9 and 10, which are the only positions for which data is included in this table." DATA_TYPE = UNSIGNED_INTEGER START_BYTE = 23 BYTES = 4 END_OBJECT = COLUMN OBJECT = COLUMN NAME = NIMS_SENSOR_DATA_NUMBER DESCRIPTION = "Sensor data from the 17 NIMS detectors, in order 1-17. Ten-bit raw data numbers (0-1023) from the current mirror position are expanded to 16 bits." DATA_TYPE = UNSIGNED_INTEGER START_BYTE = 30 BYTES = 84 ITEMS = 17 ITEM_BYTES = 4 ITEM_OFFSET = 5 END_OBJECT = COLUMN END_OBJECT = TABLE END