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Please use this identifier to cite or link to this item:
http://hdl.handle.net/2014/42437
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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
Moon
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. |
| URI: | http://hdl.handle.net/2014/42437 |
| Appears in Collections: | JPL TRS 1992+
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