PDS_VERSION_ID = PDS3 /* FILE FORMAT AND LENGTH */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 2172 FILE_RECORDS = 7378 LABEL_RECORDS = 3 INTERCHANGE_FORMAT = BINARY /* POINTERS TO START RECORDS OF OBJECTS IN FILE */ ^IMAGE_HEADER = ("e1500684_na.img") ^IMAGE = ("e1500684_na.img", 4) /* IMAGE DESCRIPTION */ DATA_SET_ID = "MGS-M-MOC-NA/WA-4-RDR-L1B-V1.0" PRODUCT_ID = "E1500684_NA" PRODUCER_INSTITUTION_NAME = "MALIN SPACE SCIENCE SYSTEMS" PRODUCT_TYPE = "MAP" MISSION_NAME = "MARS GLOBAL SURVEYOR" SPACECRAFT_NAME = "MARS GLOBAL SURVEYOR" INSTRUMENT_NAME = "MARS ORBITER CAMERA" INSTRUMENT_ID = "MOC-NA" TARGET_NAME = "MARS" START_TIME = 2002-04-16T09:23:28.426 STOP_TIME = 2002-04-16T09:23:37.806 SPACECRAFT_CLOCK_START_COUNT = "0703416244.068" SPACECRAFT_CLOCK_STOP_COUNT = "N/A" ORBIT_NUMBER = 13879 PRODUCT_CREATION_TIME = 2008-02-27T00:00:00 DATA_QUALITY_DESC = "MGS:DATA_QUALITY_ID is a 10-digit number no less than 1 billion. If the digits are 1abcdefghi, then a = 0 if there was complete C-kernel coverage for this image; a = 1 if the image was mapped using partital C-kernel coverage; a = 2 if the image with mapped without using any C-kernel. Nadir (adjusted for expected pitch angle) is used for pointing when there is no C-kernel coverage. b = 1 if the scale factor for converting from absolute DN was greater than one, indicating an unexpectedly short image value range; otherwise b = 0. c = 0 if no errors were observed during the extraction from MSDP phase for this image; if problems were observed, and automatic repair was attempted c = 1; otherwise c = 2 and no further quality analysis was performed. The remainder of the digits are non-zero only if automatic repair was attempted. d = the number of stretches of missing MSDP fragments, e.g., if fragments 0-7 were expected, but only fragments 0/1/4/6/7 were present, then d = 2. e = the number of data gaps after repair, including both leading and trailing gaps, if any; if there are more than 9 data gaps, e = 9. f = percent of missing data after repair, divided by 10 and rounded to the nearest integer between 0 and 9. g = length of the largest gap, measured in percent, divided by 10 and rounded to the nearest integer between 0 and 9. h = length of the longest contiguous stretch of non-missing image data, divided by 10 and rounded to the nearest integer between 0 and 9. i = 0 if there is reasonable confidence that the repair was successful, and that the correct number of missing data were placed before or after each data gap; i = 1 if there is little or no such confidence. " MGS:DATA_QUALITY_ID = "1000000000" NOTE = "Observation notes: SAMPLE MATERIAL COVERING CRATER RIM IN SOUTH POLAR REGION Processing notes: Raw camera COUNT was converted to absolute DN by DN = ((COUNT - Z + OFFSET)/GAIN - G - DC*EX)/EX where Z = 25.576700 OFFSET = 120 GAIN = 46.740000 G = 0.381963 DC = 0.000000 EX = 1.928400 Absolute DN was destriped, and was scaled to an unsigned 16-bit value by VAL16 = 2000*DN + 10000 The 16-bit value was scaled to an unsigned 8-bit value in the range [1,255] by VAL8 = 0.223199*(VAL16 + -13186.000000) + 1.000000 The scaling factors for this last step were calculated to attain good contrast while preserving the significant portion of the image histogram. " /* DESCRIPTION OF OBJECTS CONTAINED IN FILE */ OBJECT = IMAGE BANDS = 1 BAND_STORAGE_TYPE = BAND_SEQUENTIAL BAND_NAME = "N/A" LINES = 7375 LINE_SAMPLES = 2172 SAMPLE_TYPE = UNSIGNED_INTEGER SAMPLE_BITS = 8 SAMPLE_BIT_MASK = 2#11111111# MINIMUM = 0 MAXIMUM = 255 CHECKSUM = 791542149 END_OBJECT = IMAGE OBJECT = IMAGE_MAP_PROJECTION ^DATA_SET_MAP_PROJECTION = "DSMAP.CAT" COORDINATE_SYSTEM_TYPE = "BODY-FIXED ROTATING" COORDINATE_SYSTEM_NAME = "PLANETOCENTRIC" POSITIVE_LONGITUDE_DIRECTION = "EAST" A_AXIS_RADIUS = 3396.1900000 B_AXIS_RADIUS = 3396.1900000 C_AXIS_RADIUS = 3396.1900000 MAP_PROJECTION_TYPE = "POLAR STEREOGRAPHIC" MAP_RESOLUTION = 14817.9980657 MAP_SCALE = 0.004000182566 CENTER_LATITUDE = -90.0000000 CENTER_LONGITUDE = 168.0000000 REFERENCE_LATITUDE = "N/A" REFERENCE_LONGITUDE = "N/A" FIRST_STANDARD_PARALLEL = "N/A" SECOND_STANDARD_PARALLEL = "N/A" LINE_FIRST_PIXEL = 1 SAMPLE_FIRST_PIXEL = 1 LINE_LAST_PIXEL = 7375 SAMPLE_LAST_PIXEL = 2172 LINE_PROJECTION_OFFSET = 259743.0000000 SAMPLE_PROJECTION_OFFSET = 1595.0000000 MAXIMUM_LATITUDE = -72.6056244 MINIMUM_LATITUDE = -73.0925201 EASTERNMOST_LONGITUDE = 168.1307701 WESTERNMOST_LONGITUDE = 167.6378892 MAP_PROJECTION_ROTATION = 0.0000000 END_OBJECT = IMAGE_MAP_PROJECTION OBJECT = IMAGE_HEADER BYTES = 6516 HEADER_TYPE = ODL INTERCHANGE_FORMAT = ASCII END_OBJECT = IMAGE_HEADER END