urn:nasa:pds:lp_rs_jpl_gravity_derived:data_ascii:jbl070d1_ascii 1.0 1.14.0.0 Product_Observational 2021-01-14 1.0 PDS4 migrated product. Lunar Prospector Mission urn:nasa:pds:context:investigation:mission.lunar_prospector data_to_investigation Lunar Prospector Host urn:nasa:pds:context:instrument_host:spacecraft.lp is_instrument_host Radio Science Subsystem Instrument urn:nasa:pds:context:instrument:lp.rss is_instrument Moon Satellite urn:nasa:pds:context:target:satellite.earth.moon data_to_target urn:nasa:pds:lp_rs_jpl_gravity_derived:data_image:jbl070d1_img data_to_associate jbl070d1.dat This file contains a digital, 1 X 1 degree resolution grid of Bouguer gravity anomalies of the moon. It is a 360 x 180 grid from 89.5 to -89.5 degrees latitude, and -180.0 to 179.0 degrees longitude. The observation is Bouguer vertical gravity in milligals at the surface referenced to a sphere of 1738.0 km radius. The Bouguer anomaly is the observed gravity as given by the indicated gravity model minus the theoretical gravity from the topography model. A crustal density of 2.8 and mean density of 3.34 gm/cm^3 are used together with the GLTM-2C 90th degree and order topography model (Smith et. al., 1997, Topography of the Moon from the Clementine Lidar, Journal of Geophysical Research, 102, 1591-1611) to determine the theoretical gravity. The degree one terms are not included and there is no correction for maria fill. The method of computing the theoretical gravity of a topography model was done by expanding in powers (Wieczorek and Phillips, 1998, Potential Anomalies on a Sphere: Applications to the Lunar Crust, Journal of Geophysical Research, 103, 1715-1724). The anomaly may be from a truncation in degree of a delivered gravity field. The naming convention for the degree used is, e.g., JBL070D where 70 indicates the maximum degree of the gravity field used to create the grid. This is a 2-D grid of the Bouguer gravity anomalies of the Moon in milligals (1 milligal = 0.01 mm/s/s). The file contains 180 blocks of 36 records, with each record containing 10 Bouguer anomaly values plus an ASCII carriage-return line-feed pair as a delimiter. The first block contains values at 89.5N latitude; the first value in the first record is the Bouguer anomaly at (89.5N, 180.0W). 0 7-Bit ASCII Text Carriage-Return Line-Feed jbl070d1.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed