PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH FILE_RECORDS = 5760 RECORD_BYTES = 23040 ^IMAGE = "MEGR00N180GB.IMG" DATA_SET_ID = "MGS-M-MOLA-5-MEGDR-L3-V1.0" PRODUCT_ID = "MEGR00N180GB.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 = 2001-06-30T11:10:40.000 START_ORBIT_NUMBER = 3 STOP_ORBIT_NUMBER = 20333 PRODUCT_CREATION_TIME = 2003-03-21T01:00:00 PRODUCT_VERSION_ID = "2.0" PRODUCER_ID = MGS_MOLA_TEAM PRODUCER_FULL_NAME = "DAVID E. SMITH" PRODUCER_INSTITUTION_NAME = "GODDARD SPACE FLIGHT CENTER" DESCRIPTION = "This data product is a shape map of Mars at a resolution of 0.015625 (1/64) by 0.015625 degrees, based on altimetry data acquired by the Mars Global Surveyor MOLA instrument and accumulated over the course of the primary and extended mission. 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 0.015625-degree latitude. Map coordinates use the IAU2000 reference system. The binned data include all MOLA nadir observations from the Mapping Phase through the Primary and Extended missions, from the end of aerobraking in February 1999 through June 2001. 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. Data are adjusted using a first-order crossover solution for radial, along-track, and across-track position. 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 1.2 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 nearly 600,000,000 observations are represented." OBJECT = IMAGE NAME = MEAN_RADIUS DESCRIPTION = "Each sample represents scaled mean planetary radius within a 0.015625 by 0.015625 degree area. Where no observations lie within the area, an interpolated value is supplied. Owing to the polar MGS orbit, density is lowest near the equator, where about 55% of bins contain at least one MOLA shot. There are gaps, however, of up to 12 km between profiles." LINES = 5760 LINE_SAMPLES = 11520 SAMPLE_TYPE = MSB_INTEGER SAMPLE_BITS = 16 UNIT = METER OFFSET = 3396000 SCALING_FACTOR = 1 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 = 5760 SAMPLE_FIRST_PIXEL = 1 SAMPLE_LAST_PIXEL = 11520 MAP_PROJECTION_ROTATION = 0.0 MAP_RESOLUTION = 64.0 MAP_SCALE = 0.926 MAXIMUM_LATITUDE = 0.0 MINIMUM_LATITUDE = -90.0 WESTERNMOST_LONGITUDE = 180.0 EASTERNMOST_LONGITUDE = 360.0 LINE_PROJECTION_OFFSET = 0.5 SAMPLE_PROJECTION_OFFSET = 0.5 COORDINATE_SYSTEM_TYPE = "BODY-FIXED ROTATING" COORDINATE_SYSTEM_NAME = "PLANETOCENTRIC" END_OBJECT = IMAGE_MAP_PROJECTION END