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Detection of the lunar body tide by the Lunar Orbiter Laser Altimeter

Author(s)
Mazarico, Erwan Matias; Barker, Michael K.; Neumann, Gregory A.; Zuber, Maria; Smith, David Edmund
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Abstract
The Lunar Orbiter Laser Altimeter instrument onboard the Lunar Reconnaissance Orbiter spacecraft collected more than 5 billion measurements in the nominal 50 km orbit over ~10,000 orbits. The data precision, geodetic accuracy, and spatial distribution enable two-dimensional crossovers to be used to infer relative radial position corrections between tracks to better than ~1 m. We use nearly 500,000 altimetric crossovers to separate remaining high-frequency spacecraft trajectory errors from the periodic radial surface tidal deformation. The unusual sampling of the lunar body tide from polar lunar orbit limits the size of the typical differential signal expected at ground track intersections to ~10 cm. Nevertheless, we reliably detect the topographic tidal signal and estimate the associated Love number h[subscript 2] to be 0.0371 ± 0.0033, which is consistent with but lower than recent results from lunar laser ranging.
Date issued
2014-04
URI
http://hdl.handle.net/1721.1/97925
Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Journal
Geophysical Research Letters
Publisher
American Geophysical Union (AGU)
Citation
Mazarico, Erwan, Michael K. Barker, Gregory A. Neumann, Maria T. Zuber, and David E. Smith. “Detection of the Lunar Body Tide by the Lunar Orbiter Laser Altimeter.” Geophysical Research Letters 41, no. 7 (April 4, 2014): 2282–2288.
Version: Final published version
ISSN
00948276

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