GRGM900C: A degree 900 lunar gravity model from GRAIL primary and extended mission data
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Zuber_GRGM900C.pdf
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Author(s)
Lemoine, Frank G.
Goossens, Sander
Sabaka, Terence J.
Nicholas, Joseph B.
Mazarico, Erwan Matias
Rowlands, David D.
Loomis, Bryant D.
Chinn, Douglas S.
Neumann, Gregory A.
Smith, David Edmund
Date Issued
May 2014
Journal
Geophysical Research Letters
Publisher
American Geophysical Union (AGU)
Citation
Lemoine, Frank G., Sander Goossens, Terence J. Sabaka, Joseph B. Nicholas, Erwan Mazarico, David D. Rowlands, Bryant D. Loomis, et al. “GRGM900C: A Degree 900 Lunar Gravity Model from GRAIL Primary and Extended Mission Data.” Geophysical Research Letters 41, no. 10 (May 28, 2014): 3382–3389.
Version
Final published version
Abstract
We 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[superscript −4]/ℓ[superscript 2] was applied only for degree ℓ greater than 600. The model produces global correlations of gravity, and gravity predicted from lunar topography of ≥ 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 μm/s RMS, whereas the last month of Ka-Band Range-Rate data obtained from altitudes of 2–10 km fit at 0.98 μm/s RMS, indicating that there is still signal inherent in the tracking data beyond degree 900.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1002/2014GL060027
