PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH FILE_RECORDS = 2880 RECORD_BYTES = 11520 ^IMAGE = "IEG0062T.IMG" DATA_SET_ID = "MGS-M-MOLA-5-IEGDR-L3-V2.0" PRODUCT_ID = "MOLA-IEG0062_TOPO.IMG" SPACECRAFT_NAME = "MARS GLOBAL SURVEYOR" INSTRUMENT_ID = MOLA INSTRUMENT_NAME = MARS_ORBITER_LASER_ALTIMETER TARGET_NAME = MARS START_TIME = 1997-09-15T19:10:00.000 STOP_TIME = 2000-06-01T16:51:07.180 START_ORBIT_NUMBER = 3 STOP_ORBIT_NUMBER = 15516 PRODUCT_CREATION_TIME = 2000-09-26T12:00:00 PRODUCER_ID = MGS_MOLA_TEAM PRODUCER_FULL_NAME = "DAVID E. SMITH" PRODUCER_INSTITUTION_NAME = "GODDARD SPACE FLIGHT CENTER" DESCRIPTION = "This data product is a topographic map of Mars at a resolution of 0.0625 by 0.0625 degrees, based on altimetry data acquired by the Mars Global Surveyor MOLA instrument and accumulated over the course of the mission so far. The MOLA Precision Experiment Data Records (PEDRs) are the source for this data set. The map is in the form of a binary table with one row for each 0.0625-degree latitude, from 0 to 360 degrees East longitude and 90 to -90 degrees latitude. The binned data include all MOLA nadir observations from the Mapping Phase, from the end of aerobraking through June 2000. Additionally, off-nadir observations of the north pole are included from 87 N latitude and northward, taken during the spring of 1998, and of both poles taken during Mapping from 87 N and S to the poles. Parts of orbits are excluded where solutions for these orbits are deemed to be poor. (Note: subtract 10000 from a MOLA mapping phase orbit number to determine the equivalent MGS Project orbit number.) Also excluded are shots more than 1 degree off-nadir (except as noted above), channel 4 returns, and any returns not classified as ground returns, e.g. clouds or noise, according to the SHOT_CLASSIFICATION_CODE. A total of 333689926 observations are represented, filling 84% of the bins." OBJECT = IMAGE NAME = MEDIAN_TOPOGRAPHY DESCRIPTION = "Each sample represents median observed topography within a 0.0625 by 0.0625 degree area. Where no observations lie within the area, an interpolated value is supplied. The minimum and maximum topography observations within the current data set are -8180. and 21287 meters. Topography is the planetary radius minus the areoid radius at a given longitude and latitude." LINES = 2880 LINE_SAMPLES = 5760 SAMPLE_TYPE = MSB_INTEGER SAMPLE_BITS = 16 UNIT = METER MINIMUM = -8156 MAXIMUM = 21191 END_OBJECT = IMAGE OBJECT = IMAGE_MAP_PROJECTION ^DATA_SET_MAP_PROJECTION = "DSMAP.CAT" MAP_PROJECTION_TYPE = "SIMPLE CYLINDRICAL" A_AXIS_RADIUS = 3396.0 B_AXIS_RADIUS = 3396.0 C_AXIS_RADIUS = 3396.0 FIRST_STANDARD_PARALLEL = "N/A" SECOND_STANDARD_PARALLEL = "N/A" POSITIVE_LONGITUDE_DIRECTION = "EAST" CENTER_LATITUDE = 0.0 CENTER_LONGITUDE = 180.0 REFERENCE_LATITUDE = "N/A" REFERENCE_LONGITUDE = "N/A" LINE_FIRST_PIXEL = 1 LINE_LAST_PIXEL = 2880 SAMPLE_FIRST_PIXEL = 1 SAMPLE_LAST_PIXEL = 5760 MAP_PROJECTION_ROTATION = 0.0 MAP_RESOLUTION = 16.0 MAP_SCALE = 3.705 MAXIMUM_LATITUDE = 90.0 MINIMUM_LATITUDE = -90.0 WESTERNMOST_LONGITUDE = 0.0 EASTERNMOST_LONGITUDE = 360.0 LINE_PROJECTION_OFFSET = 1440.5 SAMPLE_PROJECTION_OFFSET = 2880.5 COORDINATE_SYSTEM_TYPE = "BODY-FIXED ROTATING" COORDINATE_SYSTEM_NAME = "PLANETOCENTRIC" END_OBJECT = IMAGE_MAP_PROJECTION END