PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 122 FILE_RECORDS = 11474 ^SHADR_HEADER_TABLE = ("GGLP_GLGM3150_SHA.TAB",1) ^SHADR_COEFFICIENTS_TABLE = ("GGLP_GLGM3150_SHA.TAB",3) INSTRUMENT_HOST_NAME = "LUNAR PROSPECTOR" TARGET_NAME = "MOON" INSTRUMENT_NAME = "RADIO SCIENCE SUBSYSTEM" DATA_SET_ID = "LP-L-RSS-5-GLGM3/GRAVITY-V1.0" OBSERVATION_TYPE = "GRAVITY FIELD" ORIGINAL_PRODUCT_ID = "GLGM-3" PRODUCT_ID = "GGLP_GLGM3150_SHA.TAB" PRODUCT_RELEASE_DATE = 2011-04-30 DESCRIPTION = " 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." START_TIME = 1966-08-10T00:00:00 STOP_TIME = 1999-07-30T23:59:59 PRODUCT_CREATION_TIME = 2009-05-26T17:16:11 PRODUCER_FULL_NAME = "ERWAN MAZARICO" PRODUCER_INSTITUTION_NAME = "GODDARD SPACE FLIGHT CENTER" PRODUCT_VERSION_TYPE = "FINAL" PRODUCER_ID = "LRO RST" SOFTWARE_NAME = "SOLVE;200502.03" OBJECT = SHADR_HEADER_TABLE ROWS = 1 COLUMNS = 8 ROW_BYTES = 137 ROW_SUFFIX_BYTES = 107 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The SHADR header includes descriptive information about the spherical harmonic coefficients which 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." OBJECT = COLUMN NAME = "REFERENCE RADIUS" DATA_TYPE = ASCII_REAL START_BYTE = 1 BYTES = 23 FORMAT = "E23.16" UNIT = "KILOMETER" DESCRIPTION = "The assumed reference radius of the spherical planet." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "CONSTANT" DATA_TYPE = ASCII_REAL START_BYTE = 25 BYTES = 23 FORMAT = "E23.16" UNIT = "N/A" DESCRIPTION = "For a gravity field model the assumed gravitational constant GM in km cubed per seconds squared for the planet. For a topography model, set to 1." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "UNCERTAINTY IN CONSTANT" DATA_TYPE = ASCII_REAL START_BYTE = 49 BYTES = 23 FORMAT = "E23.16" UNIT = "N/A" DESCRIPTION = "For a gravity field model the uncertainty in the gravitational constant GM in km cubed per seconds squared for the planet (or, set to 0 if not known). For a topography model, set to 0." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DEGREE OF FIELD" DATA_TYPE = ASCII_INTEGER START_BYTE = 73 BYTES = 5 FORMAT = "I5" UNIT = "N/A" DESCRIPTION = "Degree of the model field." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ORDER OF FIELD" DATA_TYPE = ASCII_INTEGER START_BYTE = 79 BYTES = 5 FORMAT = "I5" UNIT = "N/A" DESCRIPTION = "Order of the model field." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "NORMALIZATION STATE" DATA_TYPE = ASCII_INTEGER START_BYTE = 85 BYTES = 5 FORMAT = "I5" UNIT = "N/A" DESCRIPTION = "The normalization indicator. For gravity field: 0 coefficients are unnormalized 1 coefficients are normalized 2 other." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "REFERENCE LONGITUDE" POSITIVE_LONGITUDE_DIRECTION = "EAST" DATA_TYPE = ASCII_REAL START_BYTE = 91 BYTES = 23 FORMAT = "E23.16" UNIT = "DEGREE" DESCRIPTION = "The reference longitude for the spherical harmonic expansion; normally 0." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "REFERENCE LATITUDE" DATA_TYPE = ASCII_REAL START_BYTE = 115 BYTES = 23 FORMAT = "E23.16" UNIT = "DEGREE" DESCRIPTION = "The reference latitude for the spherical harmonic expansion; normally 0." END_OBJECT = COLUMN END_OBJECT = SHADR_HEADER_TABLE OBJECT = SHADR_COEFFICIENTS_TABLE ROWS = 11473 COLUMNS = 6 ROW_BYTES = 107 ROW_SUFFIX_BYTES = 15 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "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." OBJECT = COLUMN NAME = "COEFFICIENT DEGREE" DATA_TYPE = ASCII_INTEGER START_BYTE = 1 BYTES = 5 FORMAT = "I5" UNIT = "N/A" DESCRIPTION = "The degree index m of the C and S coefficients in this record." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "COEFFICIENT ORDER" DATA_TYPE = ASCII_INTEGER START_BYTE = 7 BYTES = 5 FORMAT = "I5" UNIT = "N/A" DESCRIPTION = "The order index n of the C and S coefficients in this record." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "C" DATA_TYPE = ASCII_REAL START_BYTE = 13 BYTES = 23 FORMAT = "E23.16" UNIT = "N/A" DESCRIPTION = "The coefficient Cmn for this spherical harmonic model." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "S" DATA_TYPE = ASCII_REAL START_BYTE = 37 BYTES = 23 FORMAT = "E23.16" UNIT = "N/A" DESCRIPTION = "The coefficient Smn for this spherical harmonic model." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "C UNCERTAINTY" DATA_TYPE = ASCII_REAL START_BYTE = 61 BYTES = 23 FORMAT = "E23.16" UNIT = "N/A" DESCRIPTION = "The uncertainty in the coefficient Cmn for this spherical harmonic model." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "S UNCERTAINTY" DATA_TYPE = ASCII_REAL START_BYTE = 85 BYTES = 23 FORMAT = "E23.16" UNIT = "N/A" DESCRIPTION = "The uncertainty in the coefficient Smn for this spherical harmonic model." END_OBJECT = COLUMN END_OBJECT = SHADR_COEFFICIENTS_TABLE END