PDS_VERSION_ID = "PDS3" /*** GENERAL DATA DESCRIPTION PARAMETERS ***/ PRODUCT_VERSION_ID = "V3.0" DATA_SET_ID = "LRO-L-LOLA-4-GDR-V1.0" PRODUCT_ID = "LDEM_512_45N_90N_270_360" INSTRUMENT_HOST_NAME = "LUNAR RECONNAISSANCE ORBITER" INSTRUMENT_NAME = "LUNAR ORBITER LASER ALTIMETER" INSTRUMENT_ID = "LOLA" MISSION_PHASE_NAME = {"COMMISSIONING","NOMINAL MISSION","SCIENCE MISSION","EXTENDED SCIENCE MISSION", "SECOND EXTENDED SCIENCE MISSION","THIRD EXTENDED SCIENCE MISSION"} TARGET_NAME = MOON START_TIME = 2009-07-13T17:33:17 STOP_TIME = 2016-11-29T05:48:19 PRODUCT_CREATION_TIME = 2017-09-15 PRODUCER_ID = LRO_LOLA_TEAM PRODUCER_FULL_NAME = "DAVID E. SMITH" PRODUCER_INSTITUTION_NAME = "GODDARD SPACE FLIGHT CENTER" DESCRIPTION = "This data product is a rectangular subsection (tile) of a global shape map (radius) of the Moon at a resolution of 512 pix/deg by 512 pix/deg, based on based on altimetry data acquired through mission phase LRO_ES_52 by the LOLA instrument. All LOLA data used for the generation of this GDR products are geolocated using precision orbits based on a revised lunar gravity field GRGM 900C[LEMOINEETAL2014]. The previous version of this product was generated with data through LRO_ES_21. An additional 505,763,339 data points have been added. The gridfiles were produced in 45 degree latitude bands, and there may be edge artifacts at this boundary. Unlike previous versions of these products, the Generic Mapping Tools (GMT) program 'grdblend' was not used. At higher resolutions, the GMT5.4.2 program 'surface' was used to compensate for incomplete coverage. Tension was set to 0.5 and Anisotropy to 0.5 to minimize latitude distortion. The map is in the form of a binary table with one row for each 0.0019531250 degrees of latitude, pixel registered. Map values are relative to a radius of 1737.4 km. This label describes an IMG file in the form of a binary resampling to pixel registration. " OBJECT = UNCOMPRESSED_FILE FILE_NAME = "LDEM_512_45N_90N_270_360.IMG" RECORD_TYPE = FIXED_LENGTH FILE_RECORDS = 23040 RECORD_BYTES = 92160 ^IMAGE = "LDEM_512_45N_90N_270_360.IMG" OBJECT = IMAGE NAME = HEIGHT DESCRIPTION = "Each sample represents height relative to a reference radius (OFFSET) and is generated using geolocated LOLA data produced by the LOLA team." LINES = 23040 LINE_SAMPLES = 46080 SAMPLE_TYPE = LSB_INTEGER SAMPLE_BITS = 16 UNIT = METER SCALING_FACTOR = 0.5 OFFSET = 1737400. /* NOTE: */ /* Conversion from Digital Number to HEIGHT, i.e. elevation in meters, is: */ /* HEIGHT = (DN * SCALING_FACTOR). */ /* The conversion from Digital Number to PLANETARY_RADIUS in meters is: */ /* PLANETARY_RADIUS = (DN * SCALING_FACTOR) + OFFSET */ /* where OFFSET is the radius of a reference sphere. */ /* The planetopotential TOPOGRAPHY is PLANETARY_RADIUS - GEOID_RADIUS, */ /* where GEOID_RADIUS is derived from a gravitational equipotential model. */ /* By convention, the average GEOID_RADIUS at the equator is OFFSET. */ END_OBJECT = IMAGE END_OBJECT = UNCOMPRESSED_FILE OBJECT = IMAGE_MAP_PROJECTION ^DATA_SET_MAP_PROJECTION = "DSMAP.CAT" MAP_PROJECTION_TYPE = "SIMPLE CYLINDRICAL" MAP_RESOLUTION = 512 A_AXIS_RADIUS = 1737.4 B_AXIS_RADIUS = 1737.4 C_AXIS_RADIUS = 1737.4 FIRST_STANDARD_PARALLEL = 'N/A' SECOND_STANDARD_PARALLEL = 'N/A' POSITIVE_LONGITUDE_DIRECTION = "EAST" CENTER_LATITUDE = 0. CENTER_LONGITUDE = 180. REFERENCE_LATITUDE = 'N/A' REFERENCE_LONGITUDE = 'N/A' LINE_FIRST_PIXEL = 1 LINE_LAST_PIXEL = 23040 SAMPLE_FIRST_PIXEL = 1 SAMPLE_LAST_PIXEL = 46080 MAP_PROJECTION_ROTATION = 0.0 MAP_SCALE = 0.0592252938 MAXIMUM_LATITUDE = 90 MINIMUM_LATITUDE = 45 WESTERNMOST_LONGITUDE = 270 EASTERNMOST_LONGITUDE = 360 LINE_PROJECTION_OFFSET = 46079.5 SAMPLE_PROJECTION_OFFSET = -46080.5 COORDINATE_SYSTEM_TYPE = "BODY-FIXED ROTATING" COORDINATE_SYSTEM_NAME = "MEAN EARTH/POLAR AXIS OF DE421" END_OBJECT = IMAGE_MAP_PROJECTION END