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Navigation of the GRAIL spacecraft pair through the extended mission at the Moon

Show simple item record Goodson, Troy D. Antreasian, Peter G. Bhat, Ram S. Chung, Min-Kun Criddle, Kevin E. Hatch, Sara J. Jefferson, David C. Lau, Eunice L. Roncoli, Ralph B. Ryne, Mark S. Sweetser, Theodore H. You, Tung-Han Young, Brian T. Wong, Mau C. Kangas, Julie A. Wen, Hui Ying 2014-03-12T20:34:38Z 2014-03-12T20:34:38Z 2013-08-11
dc.identifier.citation AAS/AIAA Astrodynamics Specialist Conference, Hilton Head, South Carolina, August 11-15, 2013 en_US
dc.identifier.clearanceno CL#13-3415
dc.description.abstract The GRAIL extended mission (XM) dramatically expands the scope of GRAIL’s gravity science investigation by flying the pair of spacecraft at the lowest orbit the flight team can safely support. From the perspective of the Navigation team, the low orbit altitude introduces new challenges. At this lower altitude, navigation is more sensitive to higher-order terms of the gravity field so that orbit determination solutions are more difficult and there is less certainty of achieving maneuver targets. This paper reports on the strategy and performance of the Navigation system for GRAIL’s XM. On a weekly basis, the Navigation team provided reference trajectory updates, designed three maneuvers, and reconstructed the execution of those maneuvers. In all, the XM involved 55 planned maneuvers; five were canceled. The results of the Navigation team’s efforts, in terms of maintaining the reference-trajectory targets, satisfying requirements, and achieving desired separation distances, are assessed. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2013 en_US
dc.subject Gravity Recovery And Interior Laboratory (GRAIL) en_US
dc.subject Discovery en_US
dc.subject gravity en_US
dc.subject Lunar Gravity Ranging System (LGRS) en_US
dc.subject Ka-band en_US
dc.subject orbit en_US
dc.title Navigation of the GRAIL spacecraft pair through the extended mission at the Moon en_US
dc.type Preprint en_US

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