NJPL1I00PDS100000000 = SFDU_LABEL RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 80 FILE_RECORDS = 275920 ^CATALOG_TABLE = 'IRTMCAT.DAT' SPACECRAFT_NAME = {VIKING_ORBITER_1, VIKING_ORBITER_2} SPACECRAFT_ID = {VO1, VO2} INSTRUMENT_NAME = "Infrared Thermal Mapper" INSTRUMENT_ID = IRTM NOTE = "Viking Orbiter InfraRed Thermal Mapper Database of Mars: Catalog of observations by both orbiters in 10 x 10 degree bins.\n \n The IRTM catalog is a file of observational sequence entries in 10 by 10 degree bins on Mars, sorted by bin number. Thus all sequences with data in a particular bin have entries in one contiguous part of the catalog. There are 650 bins: 648 10 by 10 degree bins in the Mariner 9 Mark IV scheme, and 2 landing site bins, 2 degrees square. The bin function is: ' ((90-LAT)/10)*36 + LON/10 + 1 (for 1-648) '\n ' '\n ' 180W 0 180E '\n ' 90N --------------------------------------- 90N '\n ' |18 17 3 2 1 36 35 20 19| '\n ' | ...37 | '\n ' | | '\n ' 0 | | '\n ' | | '\n ' | | '\n ' | 648... | '\n ' 90S --------------------------------------- 90S '\n ' 180W 0 180E '\n Landing site bins are 649 for VL-1 and 650 for VL-2. A separate index (IRTM.XCAT) containing pointers to the starting record of each of the 650 bins exists." OBJECT = CATALOG_TABLE FORMAT = BINARY ROW_BYTES = 80 ROW_COLUMNS = 21 ROWS = 275920 OBJECT = BIN_NUMBER TYPE = VAX_INTEGER START_BYTE = 1 BYTES = 2 NOTE = "10 x 10 degree bin number on Mars in the Mariner 9 Mark IV scheme (1-648) plus Viking landing sites VL-1 (649) and VL-2 (650). See also table NOTE." END_OBJECT = BIN_NUMBER OBJECT = INTEGER_JULIAN_DAY TYPE = VAX_INTEGER START_BYTE = 3 BYTES = 2 NOTE = "Integer days of sequence start from January 0, 1950" END_OBJECT = INTEGER_JULIAN_DAY OBJECT = FRACTIONAL_JULIAN_DAY TYPE = VAX_INTEGER START_BYTE = 5 BYTES = 2 DIVISOR = 10 UNIT = MINUTE NOTE = "Fractional day of sequence start to be added to INTEGER_JULIAN_DAY" END_OBJECT = FRACTIONAL_JULIAN_DAY OBJECT = ORBIT_ID TYPE = VAX_INTEGER START_BYTE = 7 BYTES = 2 NOTE = "10000 * ORBITER_NUMBER (1 or 2) + ORBIT_NUMBER" END_OBJECT = ORBIT_ID OBJECT = SEQUENCE_NUMBER TYPE = VAX_INTEGER START_BYTE = 9 BYTES = 2 NOTE = "Sequence number within orbit, starting from 1" END_OBJECT = SEQUENCE_NUMBER OBJECT = OBSERVATIONS TYPE = VAX_INTEGER START_BYTE = 11 BYTES = 2 NOTE = "Number of observations from sequence in bin" END_OBJECT = OBSERVATIONS OBJECT = AVERAGE_QUALITY TYPE = VAX_INTEGER START_BYTE = 13 BYTES = 2 BASE = 10 DIVISOR = 10 NOTE = "Average quality of sequence data in bin. The quality of each observation is represented by bits 3-5 of the Quality Mask (see description in DATATAB.LBL) and is defined as (the log to the base 2 of the Quality Mask) minus 10. This is a number between 0 and 3, 0 being best, and 3 indicating data of the highest uncertainty. For obscure historical reasons, the average quality is stored as an integer computed by ( (the average of these values) plus 10) multiplied by 10." END_OBJECT = AVERAGE_QUALITY OBJECT = START_OBSERVATION_NUMBER TYPE = VAX_INTEGER START_BYTE = 15 BYTES = 2 MULTIPLIER = 1.12 UNIT = SECOND NOTE = "Time from sequence start of first observation in bin, in 1.12 second intervals also known as ICKs" END_OBJECT = START_OBSERVATION_NUMBER OBJECT = STOP_OBSERVATION_NUMBER TYPE = VAX_INTEGER START_BYTE = 17 BYTES = 2 MULTIPLIER = 1.12 UNIT = SECOND NOTE = "Time from sequence start of last observation in bin, in 1.12 second intervals also known as ICKs" END_OBJECT = STOP_OBSERVATION_NUMBER OBJECT = MINIMUM_SLANT_DISTANCE TYPE = VAX_INTEGER START_BYTE = 19 BYTES = 2 UNIT = KILOMETER NOTE = "Minimum distance to target (range) of observations from sequence in bin" END_OBJECT = MINIMUM_SLANT_DISTANCE OBJECT = MAXIMUM_SLANT_DISTANCE TYPE = VAX_INTEGER START_BYTE = 21 BYTES = 2 UNIT = KILOMETER NOTE = "Maximum distance to target (range) of observations from sequence in bin" END_OBJECT = MAXIMUM_SLANT_DISTANCE OBJECT = MINIMUM_EMISSION_ANGLE TYPE = VAX_INTEGER START_BYTE = 23 BYTES = 2 DIVISOR = 80.0 UNIT = DEGREE NOTE = "Minimum emission angle of observations from sequence in bin" END_OBJECT = MINIMUM_EMISSION_ANGLE OBJECT = MAXIMUM_EMISSION_ANGLE TYPE = VAX_INTEGER START_BYTE = 25 BYTES = 2 DIVISOR = 80.0 UNIT = DEGREE NOTE = "Maximum emission angle of observations from sequence in bin" END_OBJECT = MAXIMUM_EMISSION_ANGLE OBJECT = MINIMUM_PHASE_ANGLE TYPE = VAX_INTEGER START_BYTE = 27 BYTES = 2 DIVISOR = 80.0 UNIT = DEGREE NOTE = "Minimum phase angle of observations from sequence in bin" END_OBJECT = MINIMUM_PHASE_ANGLE OBJECT = MAXIMUM_PHASE_ANGLE TYPE = VAX_INTEGER START_BYTE = 29 BYTES = 2 DIVISOR = 80.0 UNIT = DEGREE NOTE = "Maximum phase angle of observations from sequence in bin" END_OBJECT = MAXIMUM_PHASE_ANGLE OBJECT = TIME_FROM_CLOSEST_APPROACH TYPE = VAX_INTEGER START_BYTE = 31 BYTES = 2 NOTE = "Time of sequence start from periapsis" END_OBJECT = TIME_FROM_CLOSEST_APPROACH OBJECT = LONGITUDE TYPE = VAX_INTEGER START_BYTE = 33 BYTES = 2 DIVISOR = 80.0 UNIT = DEGREE NOTE = "Longitude of sequence start" END_OBJECT = LONGITUDE OBJECT = LOCAL_TIME TYPE = VAX_INTEGER START_BYTE = 35 BYTES = 2 DIVISOR = 800.0 UNIT = LOCAL_HOUR NOTE = "Local time of sequence start" END_OBJECT = LOCAL_TIME OBJECT = SUB_SOLAR_LONGITUDE TYPE = VAX_INTEGER START_BYTE = 37 BYTES = 2 DIVISOR = 80.0 UNIT = DEGREE NOTE = "Longitude of sub-solar point at orbit start" END_OBJECT = SUB_SOLAR_LONGITUDE OBJECT = SUB_SOLAR_COLATITUDE TYPE = VAX_INTEGER START_BYTE = 39 BYTES = 2 DIVISOR = 80.0 UNIT = DEGREE NOTE = "Colatitude of sub-solar point at orbit start" END_OBJECT = SUB_SOLAR_COLATITUDE OBJECT = SEQUENCE_NOTE TYPE = CHARACTER START_BYTE = 41 BYTES = 40 NOTE = "SRS ID and short description of sequence" END_OBJECT = SEQUENCE_NOTE END_OBJECT = CATALOG_TABLE END