urn:nasa:pds:lp_rs_goddard_gravity_derived:data:gglp_lpe200_sha 1.0 1.14.0.0 Product_Observational 2021-01-12 1.0 PDS4 migrated product. 1966-08-10T00:00:00Z 1999-07-30T23:59:59Z 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 gglp_lpe200_sha.tab 2010-12-03T10:49:00 This file contains spherical harmonic coefficients and ancillary information for the GLGM-3 gravity model for the Moon and is complete to 150x150. The input data are the tracking data to the NASA Moon Orbiters including Lunar Orbiters 1-5 (1966-1968), the Apollo 15 and Apollo 16 subsatellites (1971-1972), Clementine (1994) and Lunar Prospector (1998-1999). This model is based on reanalysis completed in advance of the Lunar Reconnaissance Orbiter to the Moon. Due to the quantity of Lunar Prospector (LP) data, the model is in effect tuned to the LP orbit. The tracking data that were used consist of S Band Doppler tracking to these spacecraft from the antennae of the Deep Space Network (DSN). The Apollo 15 and 16 subsatellites were tracked by an independent tracking network (the MSFN, or Manned Space Flight Network). In addition, Clementine received a small amount of tracking from the Pomonkey S Band antenna operated by the Naval Research Lab in Southern Maryland. The tracking data were analyzed with the NASA GSFC Orbit Determination and Geodetic Parameter Estimation Program (GEODYN). The citation for this model is: Mazarico, E., F. G. Lemoine, S.-C. Han, and D. E. Smith (2010), GLGM-3: A degree-150 lunar gravity model from the historical tracking data of NASA Moon orbiters, J. Geophys. Res., 115, E05001, doi:10.1029/2009JE003472. (URL: http://www.agu.org/journals/je/je1005/2009JE003472/) The coordinate system for this model is the principal axis system as defined by the DE421 set of planetary ephemerides. Williams, J. G., D. H. Boggs, and W. M. Folkner (2008), DE421 lunar orbit, physical librations, and surface coordinates, Rep. IOM 335-JW,DB,WF-20080314-001, Jet Propul. Lab., Pasadena, Calif. The gravitational constant and the K2 Love number for the Moon were not adjusted, but held at a priori values from previous solutions. GM = 0.49028002380000D+13 m**3/sec**2 Reference Radius: 1738000.0 meters K2 = 0.027. The tracking data incorporated in this model are listed below: Mission Start End No. Arcs. No. Obs. Periapsis Apoapsis ------- ----- --- --------- -------- --------- -------- LO-1 08/10/66 10/27/66 70 48575 50 1830 LO-2 11/10/66 07/24/67 90 77726 50 1870 LO-3 02/09/67 10/06/67 73 62264 50 1820/320 LO-4 05/08/67 07/10/67 32 48688 2700/75 6000/4000 LO-5 08/05/67 01/29/68 70 42916 100/170 1750/2000 A15ss 08/29/71 05/19/72 93 52500 75 160 A16ss 04/27/72 05/29/72 46 42579 30 190 Clementine 02/19/94 05/04/94 40 378022 370 2960 LP nominal 01/11/98 12/18/98 184 2198751 90 45 LP extend 12/19/98 07/30/99 127 1372150 25 45 The average RMS of Fit (cm/s) and the Final Effective Data Weight for these data in GLGM-3 are listed below: Data RMS of fit Final Eff. Data Weight (cm/s) (cm/s) LO-1 0.24 3.16 LO-2 0.11 3.16 LO-3 0.07 3.16 LO-4 0.05 0.55 LO-5 0.21 0.49 A15ss 0.12 0.95 A16ss 0.15 0.32 Clementine 0.31 1.34 LP nominal 0.02 1.41 LP extended 0.25 3.78 This lunar gravity model was produced by Erwan Mazarico and Frank Lemoine under the auspices of the Lunar Reconnaissance Orbiter Project/Lunar Orbiter Laser Altimeter (LOLA) Science Team. SHADR Header Table 0 1 The SHADR header includes descriptive information about the spherical harmonic coefficients that follow in SHADR Coefficients Table. The header consists of a single record of eight (delimited) data columns requiring 137 bytes, a pad of 105 unspecified ASCII characters, an ASCII carriage-return, and an ASCII line-feed. Carriage-Return Line-Feed 8 0 244 reference radius 1 1 ASCII_Real 23 km The assumed reference radius of the spherical planet. constant 2 25 ASCII_Real 23 For a gravity field model the assumed gravitational constant GM in km cubed per second squared for the planet. For a topography model, set to 1. uncertainty in constant 3 49 ASCII_Real 23 For a gravity field model the uncertainty in the gravitational constant GM in km cubed per second squared for the planet (or, set to 0 if not known). For a topography model, set to 0. degree of field 4 73 ASCII_Integer 5 Degree of the model field. order of field 5 79 ASCII_Integer 5 Order of the model field. normalization state 6 85 ASCII_Integer 5 The normalization indicator. For gravity field: 0 coefficients are unnormalized 1 coefficients are normalized 2 other. reference longitude 7 91 ASCII_Real 23 degree The reference longitude for the spherical harmonic expansion; normally 0. reference latitude 8 115 ASCII_Real 23 degree The reference latitude for the spherical harmonic expansion; normally 0. SHADR Coefficients Table 244 20298 The SHADR coefficients table contains the coefficients for the spherical harmonic model. Each row in the table contains the degree index m, the order index n, the coefficients Cmn and Smn, and the uncertainties in Cmn and Smn. The (delimited) data require 107 ASCII characters; these are followed by a pad of 13 unspecified ASCII characters, an ASCII carriage-return, and an ASCII line-feed. Carriage-Return Line-Feed 6 0 122 coefficient degree 1 1 ASCII_Integer 5 Degree index m of the C and S coefficients in this record. coefficient order 2 7 ASCII_Integer 5 Order index n of the C and S coefficients in this record. c 3 13 ASCII_Real 23 Coefficient Cmn for this spherical harmonic model. s 4 37 ASCII_Real 23 Coefficient Smn for this spherical harmonic model. c uncertainty 5 61 ASCII_Real 23 Uncertainty in the coefficient Cmn for this spherical harmonic model. s uncertainty 6 85 ASCII_Real 23 Uncertainty in the coefficient Smn for this spherical harmonic model. gglp_lpe200_sha.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed