urn:nasa:pds:magellan_scvdr:data_gmf:gmf04737 1.0 1.23.0.0 Product_Observational 2025-09-15 1.0 Initial PDS4 version Magellan Mission urn:nasa:pds:context:investigation:mission.magellan data_to_investigation The Magellan Spacecraft Host urn:nasa:pds:context:instrument_host:spacecraft.mgn is_instrument_host Magellan Spacecraft Radar System Instrument urn:nasa:pds:context:instrument:mgn.rdrs is_instrument Venus Planet urn:nasa:pds:context:target:planet.venus data_to_target SCVDR 1 4737 Mapping Cycle 3 urn:nasa:pds:magellan_scvdr:document:scvdr_sis data_to_document gmf04737_1.dat 1994-10-14T02:18:53Z The Geometry Matrix Data File (GMF) contains the values of the G-matrices used to invert the delay and frequency spectra of the Magellan altimeter. The GMF contains a CCSD header, a keyword and value SFDU, a binary header record SFDU, and one or more binary data record SFDUs, sandwiched between starting and ending marker SFDUs.

0 20 7-Bit ASCII Text CCSD header.

20 308 7-Bit ASCII Text SFDU keyword label (K-type).

Geometry Matrix Header Table 328 1 The single binary GMF header record contains the maximum sizes of arrays in the GMF data records. 7 1 44 SFDU_AGGREGATE_HEADER 1 1 ASCII_String 20 'NJPL1I00002300000024', the number '0023' is registered with the NJPL SFDU authority as the 'G-Matrix Header Record'. '00000024' signifies that the remainder of this SFDU is 24 bytes in length. NUMBER_OF_G_MATRICES 2 21 UnsignedMSB2 2 The number of G-matrices contained in this file. MAX_DIM_ANGLE_VECTOR 3 23 UnsignedMSB2 2 The largest value of NUMBER_OF_ANGLES in this file. MAX_DIM_RANGE_VECTOR 4 25 UnsignedMSB2 2 The largest value of NUMBER_OF_RANGES in this file. MAX_DIM_FREQUENCY_VECTOR 5 27 UnsignedMSB2 2 The largest value of NUMBER_OF_FREQUENCIES in this file. MAX_DIM_ANGLE_RANGE_G_MATRIX 6 29 UnsignedMSB4 4 The largest value of the product NUMBER_OF_ANGLES * NUMBER_OF_RANGES in this file. MAX_DIM_ANGLE_FREQUENCY_G_MATRIX 7 33 UnsignedMSB4 4 The largest value of the product NUMBER_OF_ANGLES * NUMBER_OF_FREQUENCIES in this file. 1 8 1 0 37 8 SPARE 1 1 UnsignedByte 1 Spare.