urn:nasa:pds:clementine1_gravity_and_topography:gravity_map:thickgrd_img 1.0 1.19.0.0 Product_Observational 2023-02-14 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 Image_Object display_settings_to_array Sample Left to Right Line Bottom to Top Image_Object cartography_parameters_to_image_object 0 360 90 -90 Equirectangular 0 0 0 Coordinate Pair 30323.3504241494811 30323.3504241494811 1 1 0 2729101.53817345342 Planetocentric Moon (2015) - Sphere 1737400 1737400 1737400 Positive East urn:nasa:pds:clementine1_gravity_and_topography:gravity_data:thickgrd data_to_associate thickgrd.img This file contains a digital, 1 X 1 degree resolution map 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. 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 landing sites. Image_Object 0 2 Last Index Fastest A byte-scaled image showing the crustal thickness of the Moon. The following algorithm translates crustal thickness to an image DN: DN = (THICKNESS [KILOMETERS] - 12.756) / 0.4358 UnsignedByte kilometers 0.4358 12.756 Line 180 1 Sample 360 2 thickgrd.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed