urn:nasa:pds:clementine1_gravity_and_topography:gravity_data:thickgrd 1.0 1.19.0.0 Product_Observational 2023-02-12 1.0 PDS4 migrated product. Deep Space Program Science Experiment Mission urn:nasa:pds:context:investigation:mission.deep_space_program_science_experiment data_to_investigation Clementine 1 Clementine 1 Host urn:nasa:pds:context:instrument_host:spacecraft.clem1 is_instrument_host Radio Science Subsystem Instrument urn:nasa:pds:context:instrument:clem1.rss is_instrument Moon Satellite urn:nasa:pds:context:target:satellite.earth.moon data_to_target urn:nasa:pds:clementine1_gravity_and_topography:gravity_map:thickgrd_img data_to_associate thickgrd.dat 6480 This file contains a digital, 1 X 1 degree resolution grid of the crustal thickness of the Moon. It is a 360 X 180 grid from 89.5 to -89.5 degrees latitude, and 0.5 to 359.5 degrees longitude. The array values are crustal thickness in kilometers. A complete Bouguer correction was applied to the lunar gravity field, using the newly derived topography from Clementine. Additional corrections were applied for the added mass of mare basalts, using the thicknesses given for eight major basins in Solomon and Head (Reviews of Geophysics, v. 18, p. 107-141, 1980). The resulting Bouguer anomalies were then inverted for the topography of the lunar moho (Mohorovicic Discontinuity), assuming a constant density crust (2800 kg/m3) and mantle (3300 kg/m3). The difference between the inferred moho topography and the surface topography is referred to as the crustal thickness. Smooth downward continuation of the Bouguer anomalies to a 61 km mean depth to the moho matches the 55 km crustal thickness obtained at the Apollo 12 and 14 landind sites. The file contains 180 blocks of 36 records each, with each record containing 10 crustal thickness values plus an ASCII carriage-return line-feed pair as a delimiter. The first block contains values at -89.5 latitude; the first value in the first record is the crustal thickness at (-89.5, 0.5). 0 7-Bit ASCII Text This is a 2-D grid of the crustal thickness of the Moon in kilometers Carriage-Return Line-Feed thickgrd.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed