CCSD3ZF0000100000001NJPL3IF0PDSX00000001 PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 52 FILE_RECORDS = 124 ^TABLE = "G_PASSES.TAB" DATA_SET_ID = "GO-J-UVS-3-RDR-SL9-G-FRAGMENT-V1.0" SPACECRAFT_NAME = "GALILEO ORBITER" MISSION_PHASE_NAME = "SHOEMAKER-LEVY 9 ENCOUNTER" TARGET_NAME = "JUPITER" OBSERVATION_ID = "SLJNFRAGMG01" NOTE = "UVS observation of impact of G fragment of comet Shoemaker-Levy 9 with Jupiter" START_TIME = 1994-199T07:02:14.445Z STOP_TIME = 1994-199T07:13:21.712Z SPACECRAFT_CLOCK_START_COUNT = "2486477:00:0" SPACECRAFT_CLOCK_STOP_COUNT = "2486487:90:9" PRODUCT_ID = "G_PASSES.TAB" PRODUCT_CREATION_TIME = 1996-11-08 PRODUCT_NAME = "SL9 G PASSES DATA" NOTE = "Data numbers recording each pass (5 1/3 sec) of the scan platform instruments across Jupiter as discussed in Hord et al. (1995)" INSTRUMENT_NAME = "ULTRAVIOLET SPECTROMETER" INSTRUMENT_ID = UVS DESCRIPTION = "This file was produced by the Galileo UVS/EUV team at the Laboratory for Atmospheric and Space Physics at the University of Colorado at Boulder. The data contained in the file was generated during the analysis of UVS data from the Shoemaker-Levy 9 comet Fragment G Jupiter impact. This analysis is reported in Geophysical Research Letters, Vol 22, No. 12, pages 1565-1568, June 15, 1995, by C.W. Hord, et al. Figure 3. Times given above are UTC times at the spacecraft. Galileo observed the S-L9 fragment G impact by oscillating the scan platform so that the fields of view of the scan-platform instruments moved to and fro across Jupiter. Each to-and-fro swath lasted 10 2/3 sec and consisted of two 5 1/3 sec passes, labelled even or odd. During the observation the UVS acquired one measurement every 7.6 msec, 4.0/528 sec. For each measurement the counting gate was open for 6.0 msec. Thus each 10 2/3 sec swath contained 1408 6.0 msec samples. The crescent of Jupiter was much smaller than the UVS slit, therefore the wavelength range of the light passing through the exit slit changed slightly as the crescent passed across the instruments field of view. The profiles obtained during each pass do not have flat tops, thus the slope of the profile tops reflect the wavelength dependence of the reflected solar spectrum in the neighborhood of 292 nm. When preparing the average pass profile to compare with the impact flash profile, the profiles from even numbered passes were reversed to allow for this effect." /* Table Description */ OBJECT = TABLE NAME = FRAGMENT_G_PASSES INTERCHANGE_FORMAT = ASCII COLUMNS = 7 ROWS = 124 ROW_BYTES = 52 OBJECT = COLUMN NAME = "FLAGS" DATA_TYPE = ASCII_INTEGER BYTES = 4 START_BYTE = 1 FORMAT = "I4" DESCRIPTION = "The flags that indicate whether a given pass is good (1) or bad (0)." END_OBJECT OBJECT = COLUMN NAME = TIMING_ADJUSTMENT DATA_TYPE = ASCII_REAL BYTES = 8 START_BYTE = 5 FORMAT = "F8.4" DESCRIPTION = "The adjustment to the timing of each pass in order to compensate for small errors in the scan-platform pointing." END_OBJECT OBJECT = COLUMN NAME = ELAPSED_SPACECRAFT_EVENT_TIME DATA_TYPE = ASCII_REAL BYTES = 10 START_BYTE = 13 FORMAT = "F10.4" DESCRIPTION = "The elapsed spacecraft event time at which the center-of-light of Jupiter was at the center of the slit during each pass." END_OBJECT OBJECT = COLUMN NAME = ELAPSED_EARTH_OBSERVATION_TIME DATA_TYPE = ASCII_REAL BYTES = 10 START_BYTE = 23 FORMAT = "F10.4" DESCRIPTION = "The elapsed earth observation time, expressed as seconds after 1994-199/07:30:00.0UTC, at which the center-of-light of Jupiter was at the center of the slit during each pass." END_OBJECT OBJECT = COLUMN NAME = AVERAGE_COUNTS_FULL_CRESCENT DATA_TYPE = ASCII_REAL BYTES = 7 START_BYTE = 33 FORMAT = "F7.3" DESCRIPTION = "The average of the counts obtained during the 1.25 sec interval when Jupiter's crescent was fully within the UVS slit. (see SL9_G_SWATHS. LABEL file, records/columns 5 and 6 FULL CRESCENT MASK-EVEN AND ODD PASSES)." END_OBJECT OBJECT = COLUMN NAME = AVERAGE_COUNTS_BACKGROUND_INTERVAL DATA_TYPE = ASCII_REAL BYTES = 7 START_BYTE = 40 FORMAT = "F7.3" DESCRIPTION = "The average of the counts obtained during the 0.75 sec (99 word) even and 1.0 sec (132 word) odd background intervals. (see SL9_G_SWATHS. LABEL file, records/columns 7 and 8 SCATTERED LIGHT BKGROUND MASK-EVEN /ODD PASSES)." END_OBJECT OBJECT = COLUMN NAME = PASS_FLAGS DATA_TYPE = ASCII_INTEGER BYTES = 4 START_BYTE = 47 FORMAT = "I4" DESCRIPTION = "The flags indicating the passes used to obtain the average profile which is used to compare with the impact flash profile. (ie. with pass #19)" END_OBJECT END_OBJECT END