DE200/LE200 and DE245/LE245: Discrepancies and the Effects on Landing Position of a Lunar Detector

Details DE200/LE200 and DE245/LE245: Discrepancies and the Effects on Landing Position of a Lunar Detector DE200/LE200 and DE245/LE245: Discrepancies and the Effects on Landing Position of a Lunar Detector

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ansho......162h&link_type=abstract

Annals of Shanghai Observatory, Academia Sinica, p. 162

Physics

Ephemerides, Global Positioning System, Libration, Coordinates, Lunar Rotation, Space Missions

Scientific paper

Both DE200/LE200 and DE245/LE245 provide users with accurate lunar and planetary ephemerides. DE200/LE200 is widely employed in a variety of research fields such as SLR and GPS, while DE245/LE245 was released only recently. DE 245/LE245 has the advantage of including lunar libration which are not induded in DE200/LE200. This paper studies the effects of the discrepancies between the two ephemerides on the landing position of a lunar detector and points out that DE245/LE245 should be preferred when a space mission needs more accurate solar-lunar position and rotation matrix from J2000.0 inertial to fixed selenocentric coordinate systems.

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