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GRGM900C: A Degree 900 Lunar Gravity Model from GRAIL Primary and Extended Mission DataWe have derived a gravity field solution in spherical harmonics to degree and order 900, GRGM900C, from the tracking data of the Gravity Recovery and Interior Laboratory (GRAIL) Primary (1 March to 29 May 2012) and Extended Missions (30 August to 14 December 2012). A power law constraint of 3.6 × 10(exp −4)/l(exp 2) was applied only for degree l greater than 600. The model produces global correlations of gravity, and gravity predicted from lunar topography of greater than or equal to 0.98 through degree 638. The model's degree strength varies from a minimum of 575-675 over the central nearside and farside to 900 over the polar regions. The model fits the Extended Mission Ka-Band Range Rate data through 17 November 2012 at 0.13 micrometers/s RMS, whereas the last month of Ka-Band Range-Rate data obtained from altitudes of 2-10 km fit at 0.98 micrometers/s RMS, indicating that there is still signal inherent in the tracking data beyond degree 900.
Document ID
20160005754
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lemoine, Frank G. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Goossens, Sander (Maryland Univ. Baltimore County Baltimore, MD, United States)
Sabaka, Terence J. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Nicholas, Joseph B. (Emergent Space Technologies, Inc. Greenbelt, MD, United States)
Mazarico, Erwan (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Rowlands, David D. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Bryant, D. Loomis (Stinger Ghaffarian Technologies, Inc. (SGT, Inc.) Greenbelt, MD, United States)
Chinn, Douglas S. (Stinger Ghaffarian Technologies, Inc. (SGT, Inc.) Greenbelt, MD, United States)
Neumann, Gregory A. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Smith, David E. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Zuber, Maria T. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Date Acquired
May 3, 2016
Publication Date
May 28, 2014
Publication Information
Publication: Geophysical Research Letters
Volume: 41
Issue: 10
ISSN: 0094-8276
Subject Category
Lunar and Planetary Science and Exploration
Report/Patent Number
GSFC-E-DAA-TN31860
Funding Number(s)
CONTRACT_GRANT: NNG06EO90A
CONTRACT_GRANT: NNG15HZ37C
Distribution Limits
Public
Copyright
Other
Keywords
Gravity
Moon
GRAIL