CCSD3ZF0000100000001NJPL3IF0PDS200000001 = SFDU_LABEL /* Detached PDS label for Mars Radar Depolarized Echo Model map */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 1452 FILE_RECORDS = 182 /* Pointers to image file and objects within it */ ^FOREIGN_LABEL = ("AMAR001U.IMG",1) ^IMAGE = ("AMAR001U.IMG",2) /* Image descriptive information */ DATA_SET_ID = "ARCB/GSSR-M-RTLS-5-MODEL-V1.0" TARGET_NAME = MARS MAP_PROJECTION_TYPE = "SIMPLE CYLINDRICAL" MAP_SCALE = 1.0 MAXIMUM_LATITUDE = 90.0 MINIMUM_LATITUDE = -90.0 MAXIMUM_LONGITUDE = 180.0 MINIMUM_LONGITUDE = 180.0 PRODUCER_FULL_NAME = "THOMAS W. THOMPSON" NOTE = "A model for Mars depolarized echoes that (1) matches the observed variation of total radar cross-section with longitude and (2) produces model spectra that have the broad features of spectra published for the Arecibo 1980 to 1982 observations. This model assumes that different geologic units on Mars backscatter in a uniformly bright manner, where radar cross-section per unit surface area is A * Cosine (angle of incidence), where A = echo strength for given area. This model assigns depolarized echo strength on degree-by-degree basis in latitude and longitude. For reference, see Thompson, T. W., and H. J. Moore, A model for depolarized radar echoes from Mars, Proceedings of the 19th Lunar and Planetary Science Conference, 409-422, 1989." /* Object descriptions */ OBJECT = FOREIGN_LABEL TYPE = VICAR2 RECORDS = 1 BYTES = 1452 ^DESCRIPTION = "VICAR2.TXT" END_OBJECT = FOREIGN_LABEL OBJECT = IMAGE LINES = 181 LINE_SAMPLES = 361 LINE_PREFIX_BYTES = 8 SAMPLE_BITS = 32 SAMPLE_TYPE = VAX_INTEGER END_OBJECT = IMAGE END