urn:nasa:pds:grail_gravity_derived:data_rsdmap:gggrx_0660pm_anom_l320 1.0 1.18.0.0 Product_Observational 2022-08-10 1.0 PDS4 migrated product. 2012-03-01T16:28:00.000Z 2012-05-29T16:36:00.000Z Gravity Recovery and Interior Laboratory Mission urn:nasa:pds:context:investigation:mission.gravity_recovery_and_interior_laboratory data_to_investigation Gravity Recovery and Interior Laboratory A Host urn:nasa:pds:context:instrument_host:spacecraft.grail-a is_instrument_host Gravity Recovery and Interior Laboratory B Host urn:nasa:pds:context:instrument_host:spacecraft.grail-b is_instrument_host Lunar Gravity Ranging System A for GRAIL-A Instrument urn:nasa:pds:context:instrument:grail-a.lgrs-a is_instrument Lunar Gravity Ranging System B for GRAIL-B Instrument urn:nasa:pds:context:instrument:grail-b.lgrs-b is_instrument Moon Satellite urn:nasa:pds:context:target:satellite.earth.moon data_to_target map_object display_settings_to_array Sample Left to Right Line Top to Bottom map_object cartography_parameters_to_image_object -180.0 180.0 90.0 -90.0 Equirectangular 0.0 0.0 0.0 Coordinate Pair 7583.4556 7583.4556 4.0 4.0 2730044.02 -5460088.03 Planetocentric 1738.0 1738.0 1738.0 Positive East Body-fixed Rotating gggrx_0660pm_anom_l320.img 2013-09-04T00:00:00.000 This data product is a map of the gravity anomalies (in mGal) of the Moon at a resolution of 4 pix/deg by 4 pix/deg. It is based on a preliminary GRAIL gravity field of the Moon produced by NASA GSFC. The gravity field is a degree and order 660 spherical harmonic model, which includes the entire nominal mission of GRAIL tracking data (March 1, 16:30 to May 29, 16:36, 2012). The field was truncated to degree and order 320 for the expansion in the spatial domain, to reduce remaining artifacts. Some details describing this model are: The spherical harmonic coefficients are fully normalized. The reference radius = 1738.0 km The planetary ephemeris is de421 and defines the lunar body-fixed coordinate system. A Kaula type power law constraint is applied to the spherical harmonics coefficients for degrees greater than 330 (2.5e-4/n^2). The weighting of the data is 0.05 microns/sec for the 5-s KBRR data and 0.12mm/s for the 10-s 2-way S-band DSN tracking data. The estimated tidal Love numbers are: k20 = 0.024165 +/- 0.000091 k21 = 0.023915 +/- 0.000013 k22 = 0.024852 +/- 0.000017 for an aggregate k2 = 0.02427 +/- 0.000054 k30 = 0.007342+/-0.001534 The reference for the GRGM660PRIM gravity field is LEMOINEETAL2013, published in the Journal of Geophysical Research with the DOI number 10.1002/jgre.20118 . Each point gives the Lunar gravity anomaly in milligals, on a reference sphere with semi-major-axis = 1738.0 km, GM = 4902.799806931690 km**3/s**2, and zero rotation rate. map_object 0 2 Last Index Fastest The Digital Map contains values of the gravity anomaly. The values can be obtained by multiplying the sample in the map by SCALING_FACTOR and then adding OFFSET. One milligal equals 0.01 mm/s/s. IEEE754LSBSingle MILLIGALS 1.0 0.0 Line 721 1 Sample 1440 2 gggrx_0660pm_anom_l320.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed