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Improved maneuver reconstructions for the GRAIL Orbiters

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dc.contributor.author Keck, Mason
dc.contributor.author You, Tung-Han
dc.date.accessioned 2013-04-18T22:25:22Z
dc.date.available 2013-04-18T22:25:22Z
dc.date.issued 2012-10-29
dc.identifier.clearanceno 12-4601
dc.identifier.uri http://hdl.handle.net/2014/42994
dc.description.abstract Maneuver reconstructions for the Gravity Recovery and Interior Laboratory (GRAIL) A and B lunar orbiters were improved through updates to the orbit determination filter and dynamic models. Consistent reconstructions of the 27 GRAIL A and B maneuvers from the Trans-Lunar Cruise phase in the fall of 2011 through the Transition to Science Formation phase in February 2012 were performed. Standard methods of orbit determination were applied incorporating the latest dynamic models and filter strategies developed by the GRAIL Navigation and Science Teams, including a high resolution, 420x420 degree and order lunar spherical harmonic gravity field model. For Trans-Lunar Cruise for GRAIL-A (TLC-A), all maneuvers executed with ΔV errors below 5.50 ±0.50 mm/s and pointing errors below 0.25 degrees. GRAIL-A lunar orbit maneuvers had ΔV errors below 30.0 mm/s and pointing errors below 0.51 degrees. For TLC-B, all maneuvers executed with ΔV errors below 8.60 ±1.41 mm/s and pointing errors below 0.300 degrees. GRAIL-B maneuvers in lunar orbit executed with maximum ΔV errors of 25.0 mm/s and pointing error of 0.43 degrees. These maneuver reconstructions will enable the GRAIL Navigation Team to better characterize the main engine performance of each spacecraft. This will help the Navigation Team to navigate low (> 8 km) altitude orbits during the extended mission phase in the fall of 2012. 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, 2012. en_US
dc.subject Gravity Recovery and Interior Laboratory (GRAIL) en_US
dc.subject lunar mapping en_US
dc.subject lunar gravity fields en_US
dc.subject Lunar Prospector LP150Q model en_US
dc.title Improved maneuver reconstructions for the GRAIL Orbiters en_US
dc.title.alternative NASA Space Grant Summer Internship, Pasadena, California, August, 2012 en_US
dc.type Student Report en_US
dc.subject.NASATaxonomy Astrodynamics en_US


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