urn:nasa:pds:grail_gravity_derived:data_rsdmap:gggrx_0900c_degstr 1.0 1.18.0.0 Product_Observational 2022-08-10 1.0 PDS4 migrated product. 2012-03-01Z 2012-12-14Z 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 0.0 360.0 90.0 -90.0 Equirectangular 0.0 0.0 180.0 Coordinate Pair 3791.7278 3791.7278 8.0 8.0 2730044.02 -5460088.03 Planetocentric 1738.0 1738.0 1738.0 Positive East Body-fixed Rotating gggrx_0900c_degstr.img 2013-05-19 This data product is a map of the degree strength of the GRGM900C model at a resolution of 8 pix/deg by 8 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 900 spherical harmonic model, which includes the entire mission of GRAIL tracking data. The full covariance matrix is typically used to propagate spatially the anomaly errors, but because of the large expansion degree of the field, a number of 'clone' fields were used to compute the uncertainty in the anomaly at the various pixel locations. The technique is described in SABAKAETAL2014. 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 600 (3.6e-4/n^2). The weighting of the KBRR data is: 0.05 microns/sec in the primary mission 0.10 microns/sec in the extended mission up to November 18, 2012 1.00 microns/sec in the extended mission after November 18, 2012 The weighting of the DSN data is: 0.05 microns/sec in the primary mission 0.12mm/s in the primary mission 0.12mm/s in the extended mission up to November 18, 2012 0.50mm/s in the extended mission after November 18, 2012 The estimated tidal Love number is k2 = 0.024116 +/- 0.000108 The reference for the GRGM900C gravity field is LEMOINEETAL2014, published in the Geophysical Research Letters with the DOI number 10.1002/2014GL060027 . For additional details on the GRAIL mission, data and methods, see LEMOINEETAL2013. Each point gives the degree strength, e.g. the degree at which the strength of the a priori Kaula constraint equals the computed error. map_object 0 2 Last Index Fastest The Digital Map contains values of the degree strength. The values can be obtained by multiplying the sample in the map by SCALING_FACTOR and then adding OFFSET. IEEE754LSBSingle 1.0 0.0 Line 1441 1 Sample 2880 2 gggrx_0900c_degstr.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed