CCSD3ZF0000100000001NJPL3IF0PDS200000001 PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 44 FILE_RECORDS = 1408 INTERCHANGE_FORMAT = ASCII ^TABLE = "G_SWATHS.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_SWATHS.TAB" PRODUCT_CREATION_TIME = 1996-11-08 PRODUCT_NAME = "SL9 G SWATHS DATA" NOTE = "Data numbers recording a swath (two 5 1/3 sec pass gathered by moving the spacecraft to and fro 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_SWATHS INTERCHANGE_FORMAT = ASCII COLUMNS = 8 ROWS = 1408 ROW_BYTES = 44 OBJECT = COLUMN NAME = ELAPSED_TIME DATA_TYPE = ASCII_REAL BYTES = 8 START_BYTE = 1 FORMAT = "F8.4" DESCRIPTION = "The elapsed time, in seconds since the beginning of each to-and-fro swath. A swath consists of an even pass, occupying words 0-703 of the swath, and an odd pass, occupying words 704-1407 of the swath." END_OBJECT OBJECT = COLUMN NAME = NUMBER_VALID_MEASUREMENTS DATA_TYPE = ASCII_INTEGER BYTES = 4 START_BYTE = 9 FORMAT = "I4" DESCRIPTION = "The number of times a good measurement was obtained at a given time out of a maximum number of 62." END_OBJECT OBJECT = COLUMN NAME = AVERAGE_GOOD_COUNTS DATA_TYPE = ASCII_REAL BYTES = 7 START_BYTE = 13 FORMAT = "F7.3" DESCRIPTION = "The average of the number of counts obtained during a good measurement." END_OBJECT OBJECT = COLUMN NAME = TRIANGULAR_SMOOTH DATA_TYPE = ASCII_REAL BYTES = 7 START_BYTE = 20 FORMAT = "F7.3" DESCRIPTION = "A triangular smooth of the previous column, Average of Good Counts, with a full width half maximum of thirteen words (approximately 0.10 sec)." END_OBJECT OBJECT = COLUMN NAME = FULL_CRESCENT_MASK_EVEN_PASSES DATA_TYPE = ASCII_INTEGER BYTES = 4 START_BYTE = 27 FORMAT = "I4" DESCRIPTION = "Contains the mask that isolates the 1.25 sec interval used to characterize the average signal from Jupiter when its crescent was fully within the slit during even passes. (ie. #s 0,2,4, ...)" END_OBJECT OBJECT = COLUMN NAME = FULL_CRESCENT_MASK_ODD_PASSES DATA_TYPE = ASCII_INTEGER BYTES = 4 START_BYTE = 31 FORMAT = "I4" DESCRIPTION = "Contains the mask that isolates the 1.25 sec interval used to characterize the average signal from Jupiter when its crescent was fully within the slit during odd passes. (ie. #s 1,3,5, ...)" END_OBJECT OBJECT = COLUMN NAME = SCATTERED_LIGHT_BKGROUND_MASK_EVEN_PASSES DATA_TYPE = ASCII_INTEGER BYTES = 4 START_BYTE = 35 FORMAT = "I4" DESCRIPTION = "Contains the mask isolating the 0.75 sec (99 word) interval used to estimate the scattered-light background for even passes." END_OBJECT OBJECT = COLUMN NAME = SCATTERED_LIGHT_BKGROUND_MASK_ODD_PASSES DATA_TYPE = ASCII_INTEGER BYTES = 4 START_BYTE = 39 FORMAT = "I4" DESCRIPTION = "Contains the mask isolating the 1.0 sec (132 word) interval used to estimate the scattered-light background for odd passes." END_OBJECT END_OBJECT END