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Title: Spacecraft thermal and optical modeling impacts on estimation of the GRAIL Lunar Gravity Field
Authors: Fahnestock, Eugene G.
Park, Ryan S.
Yuan, Dah-Ning
Konopliv, Alex S.
Keywords: Gravity Recovery and Interior Laboratory (GRAIL)
thermal modeling
thermo-optical modeling
nongravitational acceleration
gravity field
Issue Date: 13-Aug-2012
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2012.
Citation: AIAA/AAS Astrodynamics Specialist Conference, Minneapolis, Minnesota, August 13-16, 2012
Abstract: We summarize work performed involving thermo-optical modeling of the two Gravity Recovery And Interior Laboratory (GRAIL) spacecraft. We derived several reconciled spacecraft thermo-optical models having varying detail. We used the simplest in calculating SRP acceleration, and used the most detailed to calculate acceleration due to thermal re-radiation. For the latter, we used both the output of pre-launch finite-element-based thermal simulations and downlinked temperature sensor telemetry. The estimation process to recover the lunar gravity field utilizes both a nominal thermal re-radiation accleration history and an apriori error model derived from that plus an off-nominal history, which bounds parameter uncertainties as informed by sensitivity studies.
Appears in Collections:JPL TRS 1992+

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