PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 512 FILE_RECORDS = 79 ^TABLE = "OBSCAT.TAB" DATA_SET_ID = {"GO-J-NIMS-4-MOSAIC-V1.0", "GO-J-NIMS-3-TUBE-V1.0"} SPACECRAFT_NAME = GALILEO_ORBITER INSTRUMENT_NAME = "NEAR INFRARED MAPPING SPECTROMETER" INSTRUMENT_ID = NIMS OBJECT = TABLE NAME = OBSERVATION_CATALOG INDEX_TYPE = SINGLE INTERCHANGE_FORMAT = ASCII ROWS = 79 COLUMNS = 36 ROW_BYTES = 512 DESCRIPTION = "Observation table for Phase 2 Galileo scan platform observations from the Ganymede 7 encounter of Jupiter and its satellites which include NIMS data. It was prepared by automatic extraction (plus some hand editing) of material from the Galileo Spacecraft Event File (SEF) and playback command files. It is used by MIPS UDR and EDR generation software and both MIPS and ISIS cube generation software to determine attributes of the observations. Note that this table describes data returned from the spacecraft and turned into EDRs. Some planned observations were not carried out; some or all data from other observations were not returned. Since this table was designed to be used by MIPS and NIMS software, it does not follow the conventions of database-loadable PDS ASCII tables; i.e items are not comma-separated and character strings are not quoted." OBJECT = COLUMN NAME = OAPEL_ID DATA_TYPE = CHARACTER START_BYTE = 1 BYTES = 12 FORMAT = "A12" DESCRIPTION = "The Orbital Activity Profile ELement ID identifies a single planned NIMS observation. It is popularly known as the OAPEL name." END_OBJECT = COLUMN OBJECT = COLUMN NAME = ALIAS_ID DATA_TYPE = CHARACTER START_BYTE = 13 BYTES = 12 FORMAT = "A12" DESCRIPTION = "The Orbital Activity Profile ELement ID of the original observation, when NIMS is collecting ridealong data from another instrument's observation; otherwise identical to OAPEL_ID." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SEGMENT_ID DATA_TYPE = CHARACTER START_BYTE = 25 BYTES = 1 FORMAT = "A1" DESCRIPTION = "The segment ID identifies a part of an observation which has been separated for processing convenience. (Parts of observations in different instrument modes are usually processed separately.) Ordered segments within an observation are usually represented by alphabetic characters in order, beginning with 'A', except that realtime (not recorded) observations are represented by characters in order beginning with 'R'." END_OBJECT = COLUMN OBJECT = COLUMN NAME = PARAMETER_SET_ID DATA_TYPE = CHARACTER START_BYTE = 26 BYTES = 2 FORMAT = "A2" DESCRIPTION = "The parameter set ID (PSID) is a brief alias for the OAPEL_ID arising in the sequence generation process. It is usually 2 characters in length and unique." END_OBJECT = COLUMN OBJECT = COLUMN NAME = NATIVE_START_TIME DATA_TYPE = CHARACTER START_BYTE = 28 BYTES = 13 FORMAT = "A13" DESCRIPTION = "The spacecraft clock count that indicates the beginning of the returned observation segment. It is in the form rrrrrrrr:mm:r where rrrrrrrr is the RIM count, mm is the minor frame (0-90) and r is the RTI count (0-9)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = NATIVE_STOP_TIME DATA_TYPE = CHARACTER START_BYTE = 41 BYTES = 13 FORMAT = "A13" DESCRIPTION = "The spacecraft clock count that indicates the end of the returned observation segment. It is in the form rrrrrrrr:mm:r where rrrrrrrr is the RIM count, mm is the minor frame (0-90) and r is the RTI count (0-9)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = PRIMARY_TARGET_NAME DATA_TYPE = CHARACTER START_BYTE = 64 BYTES = 8 FORMAT = "A8" DESCRIPTION = "The primary target of the observation. Besides the various planets and satellites, this may be SKY, STAR (for boresight calibration), DARK (for dark calibrations) or CAL (for optical and radiometric calibrations)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = INSTRUMENT_MODE_NUMBER DATA_TYPE = INTEGER START_BYTE = 72 BYTES = 2 FORMAT = "I2" DESCRIPTION = "A number (0-15) which identifies the NIMS instrument mode during the observation segment:\n 0 Safe (fixed spectrometer)\n 1 Full map\n 2 Full spectrometer\n 3 Long map\n 4 Long spectrometer\n 5 Short map\n 6 Short spectrometer\n 7 Fixed map\n 8 Bandedge map\n 9 Bandedge spectrometer\n 10 Stop and slide map\n 11 Stop and slide spectrometer\n 12-15 Special sequences (programmable) In some calibration observations, the mode changes periodically. In such cases, the instrument mode shown is the INITIAL mode." END_OBJECT = COLUMN OBJECT = COLUMN NAME = GAIN_MODE_NUMBER DATA_TYPE = INTEGER START_BYTE = 74 BYTES = 1 FORMAT = "I1" DESCRIPTION = "A number which identifies the gain state (1-4) of the NIMS instrument during the observation segment. These states vary roughly from low gain (1) to high gain (4) and apply to the non-thermal detectors (1-14) only." END_OBJECT = COLUMN OBJECT = COLUMN NAME = CHOPPER_MODE_NUMBER DATA_TYPE = INTEGER START_BYTE = 75 BYTES = 1 FORMAT = "I1" DESCRIPTION = "A number which identifies the chopper mode of the NIMS instrument during the observation segment:\n 1 Reference mode\n 2 63-hertz mode\n 3 Free-run\n 4 Off" END_OBJECT = COLUMN OBJECT = COLUMN NAME = GRATING_OFFSET DATA_TYPE = INTEGER START_BYTE = 76 BYTES = 1 FORMAT = "I1" DESCRIPTION = "The physical offset (0-7) of the NIMS grating during the observation segment. It defines the physical grating position of logical grating position 0. It almost always has the default value 4." END_OBJECT = COLUMN OBJECT = CONTAINER NAME = PARAMETER_TABLES START_BYTE = 77 BYTES = 12 REPETITIONS = 2 DESCRIPTION = "The contents of the two Parameter Tables (PTABs) in the NIMS instrument. The PTABs control the operation of the instrument. Six items have been extracted from each 4-byte parameter table." OBJECT = COLUMN NAME = MODE_REPEAT_COUNT DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 2 FORMAT = "I2" DESCRIPTION = "The mode repeat count is the number of times the grating cycle defined in the PTAB is to be repeated before control is transferred to the other PTAB. It is the first byte of the PTAB." END_OBJECT = COLUMN OBJECT = COLUMN NAME = MIRROR_OPERATION_FLAG DATA_TYPE = INTEGER START_BYTE = 3 BYTES = 2 FORMAT = "I2" DESCRIPTION = "The mirror operation flag, if set, indicates that the NIMS secondary mirror is operating, i.e. the instrument is in a MAP mode. If the flag is not set, the mirror remains in position 9 (of 0-19), i.e. the instrument is in a SPECTROMETER mode. The flag is the first bit of the second byte of the PTAB." END_OBJECT = COLUMN OBJECT = COLUMN NAME = AUTOBIAS_FLAG DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 2 FORMAT = "I2" DESCRIPTION = "The autobias flag, if set, means that thermal channel autobias is off. This is intended for use only when the NIMS instrument is at room temperature. The flag is normally NOT set, implying that the thermal detectors (15-17) have different gains in each half of the DN range. This flag is the second bit of the second byte of the PTAB." END_OBJECT = COLUMN OBJECT = COLUMN NAME = START_GRATING_POSITION DATA_TYPE = INTEGER START_BYTE = 7 BYTES = 2 FORMAT = "I2" DESCRIPTION = "The start grating position is the first logical position of the grating when the PTAB assumes control of the instrument. It is in the 6 least significant bits of the second byte of of the PTAB." END_OBJECT = COLUMN OBJECT = COLUMN NAME = GRATING_POSITION_INCREMENT DATA_TYPE = INTEGER START_BYTE = 9 BYTES = 2 FORMAT = "I2" DESCRIPTION = "The grating position increment controls the step size between grating positions. It is the third byte of the PTAB." END_OBJECT = COLUMN OBJECT = COLUMN NAME = GRATING_POSITIONS DATA_TYPE = INTEGER START_BYTE = 11 BYTES = 2 FORMAT = "I2" DESCRIPTION = "The number of grating positions (separated by the grating position increment) in one repetition of the operation defined in the PTAB, except for fixed map and safe modes, in which it governs only the motions of the secondary mirror. It is the fourth byte of the PTAB." END_OBJECT = COLUMN END_OBJECT = CONTAINER OBJECT = COLUMN NAME = ELECTRONICS_CALIBRATION_FLAG DATA_TYPE = INTEGER START_BYTE = 101 BYTES = 1 FORMAT = "I1" DESCRIPTION = "An electronic calibration of the NIMS instrument will occur in the first RIM of the observation if the flag is set." END_OBJECT = COLUMN OBJECT = COLUMN NAME = OPTICS_CALIBRATION_FLAG DATA_TYPE = INTEGER START_BYTE = 102 BYTES = 1 FORMAT = "I1" DESCRIPTION = "An optics calibration of the NIMS instrument will occur in the first RIM of the observation if the flag is set." END_OBJECT = COLUMN OBJECT = COLUMN NAME = REALTIME_FLAG DATA_TYPE = INTEGER START_BYTE = 103 BYTES = 1 FORMAT = "I1" DESCRIPTION = "If the flag is set, the observation was transmitted in the realtime data stream." END_OBJECT = COLUMN OBJECT = COLUMN NAME = RECORD_FLAG DATA_TYPE = INTEGER START_BYTE = 104 BYTES = 1 FORMAT = "I1" DESCRIPTION = "If the flag is set, the observation was recorded on the Galileo tape recorder and transmitted later." END_OBJECT = COLUMN OBJECT = COLUMN NAME = THRESHOLDING_SELECT_FLAG DATA_TYPE = INTEGER START_BYTE = 105 BYTES = 1 FORMAT = "I1" DESCRIPTION = "The thresholding capability removes DNs which are below a per-detector threshold value -- from the stream of values (compressed or not) transmitted to the ground. It does this by prefixing each set of 10 values with a bit mask specifying which are actually present. If the thresholding select flag is 0, thresholding was *not* selected. If it is 1, 2 or 3, the corresponding sets of 17 threshold values were used in CDS to threshold data for this observation before playback. The 17 threshold values are given in the THRESHOLD_DATA_NUMBER vector." END_OBJECT = COLUMN OBJECT = COLUMN NAME = DOWN_SCAN_RTI_MASK DATA_TYPE = INTEGER START_BYTE = 107 BYTES = 5 ITEM_BYTES = 1 ITEMS = 5 FORMAT = "5I1" DESCRIPTION = "The five integers in this mask govern mirror blocking during down scans of the NIMS secondary mirror. If an integer is 1, data at the four mirror positions in the corresponding RTI (in time order) is *not* output from the NIMS instrument. If it is 0, no blocking occurs." END_OBJECT = COLUMN OBJECT = COLUMN NAME = UP_SCAN_RTI_MASK DATA_TYPE = INTEGER START_BYTE = 112 BYTES = 5 ITEM_BYTES = 1 ITEMS = 5 FORMAT = "5I1" DESCRIPTION = "The five integers in this mask govern mirror blocking during up scans of the NIMS secondary mirror. If an integer is 1, data at the four mirror positions in the corresponding RTI (in time order) is *not* output from the NIMS instrument. If it is 0, no blocking occurs." END_OBJECT = COLUMN OBJECT = COLUMN NAME = RICE_COMPRESSION_FLAG DATA_TYPE = INTEGER START_BYTE = 117 BYTES = 2 FORMAT = "I2" DESCRIPTION = "This flag (if 1) selects Rice compression in CDS of NIMS data as it is read from tape and formed into packets." END_OBJECT = COLUMN OBJECT = COLUMN NAME = ESTIMATED_COMPRESSION_RATIO DATA_TYPE = REAL START_BYTE = 120 BYTES = 3 FORMAT = "F3.1" DESCRIPTION = "The estimated compression ratio for this observation. Possible range: 1.0-9.9. (The actual ratio may be quite different.)" END_OBJECT = COLUMN OBJECT = COLUMN NAME = ESTIMATED_COMPRESSION_ERROR DATA_TYPE = REAL START_BYTE = 123 BYTES = 3 FORMAT = "F3.1" DESCRIPTION = "The estimated error in the estimated compression ratio for this observation." END_OBJECT = COLUMN OBJECT = COLUMN NAME = WAVELENGTHS DATA_TYPE = INTEGER START_BYTE = 153 BYTES = 3 FORMAT = "I3" DESCRIPTION = "Number of wavelengths selected and returned for this observation. Range: 1-408." END_OBJECT = COLUMN OBJECT = COLUMN NAME = TELEMETRY_MODE_ID DATA_TYPE = CHARACTER START_BYTE = 156 BYTES = 3 FORMAT = "A3" DESCRIPTION = "A string identifying the telemetry mode used to record or play back the data. The major phase 0 telemetry modes used in phase 2 are MPW, IM4, IM8, HIS and a few others, where all data collected by the NIMS instrument is recorded on tape. Two new phase 2 modes take advantage of wavelength and mirror position editing in the instrument. They are LPU (~60% of NIMS data) and LNR (~25% of NIMS data). RT identifies realtime transmission." END_OBJECT = COLUMN OBJECT = COLUMN NAME = START_TIME DATA_TYPE = CHARACTER START_BYTE = 159 BYTES = 21 FORMAT = "A21" DESCRIPTION = "The start time of the returned observation segment as a Universal Time in ISO format, except the first two digits of the year are blank. The start time corresponds to NATIVE_START_TIME." END_OBJECT = COLUMN OBJECT = COLUMN NAME = STOP_TIME DATA_TYPE = CHARACTER START_BYTE = 180 BYTES = 21 FORMAT = "A21" DESCRIPTION = "The stop time of the returned observation segment as a Universal Time in ISO format, except the first two digits of the year are blank. The stop time corresponds to NATIVE_STOP_TIME." END_OBJECT = COLUMN OBJECT = COLUMN NAME = THRESHOLD_DATA_NUMBER DATA_TYPE = INTEGER START_BYTE = 268 BYTES = 51 ITEM_BYTES = 3 ITEMS = 17 FORMAT = "17I3" DESCRIPTION = "Per-detector threshold data numbers used for this observation. If a particular threshold number is zero, that detector's data is *not* thresholded. If all threshold numbers are zero, thresholding is not selected. But see the THRESHOLDING_SELECT_FLAG." END_OBJECT = COLUMN OBJECT = COLUMN NAME = WET_GROUP_ID DATA_TYPE = INTEGER START_BYTE = 319 BYTES = 10 FORMAT = "I10" DESCRIPTION = "A unique identifier for the WET (Wavelength Edit Table) group used to select wavelengths for this observation. It has the form mmeelllnnn where mm is the instrument mode (0-15), ee is the number of WET entries in the group, lll is the number of wavelengths selected (001-408) and nnn is a sequence number." END_OBJECT = COLUMN OBJECT = COLUMN NAME = WET_GROUP_SIZE DATA_TYPE = INTEGER START_BYTE = 329 BYTES = 2 FORMAT = "I2" DESCRIPTION = "The number of wavelength edit entries in the WET group. Range: 1-26." END_OBJECT = COLUMN OBJECT = CONTAINER NAME = WET_GROUP START_BYTE = 331 BYTES = 7 REPETITIONS = 26 DESCRIPTION = "The WET (Wavelength Edit Table) group describes wavelength editing occurring in both the NIMS instrument and the NIMS playback editor in CDS. It consists of WET_GROUP_SIZE (up to 26) WET entries. Each entry describes wavelength editing at one (if REPEAT_COUNT is 1) or many (if REPEAT_COUNT is greater than 1) grating steps in the grating cycle." OBJECT = COLUMN NAME = REPEAT_COUNT DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 2 FORMAT = "I2" DESCRIPTION = "The number of times (grating steps) the corresponding WET mask is repeated at this point in the grating cycle. It is the first part of a WET group entry." END_OBJECT = COLUMN OBJECT = COLUMN NAME = WET_MASK DATA_TYPE = INTEGER START_BYTE = 3 BYTES = 5 FORMAT = "Z5" DESCRIPTION = "The WET mask consists of 17-bits right justified in 3 bytes. Each bit indicates the presence (if 1) or absence (if 0) of data for the corresponding detector (1 to 17, left to right) at the current grating step in the data stream. It is the second and last part of a WET group entry." END_OBJECT = COLUMN END_OBJECT = CONTAINER END_OBJECT = TABLE END