3670. Soil Moisture Active Passive Mission Mass Properties Optimization and Analysis

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Title3670. Soil Moisture Active Passive Mission Mass Properties Optimization and Analysis
Publication TypeConference Paper
Paper Number3670
Year of Publication2016
AuthorsHendry IV, Morgan, and Slimko Erich
Conference75th Annual Conference, Denver, Colorado
Conference LocationDenver, Colorado
PublisherSociety of Allied Weight Engineers, Inc.
Date Published05/2016
Abstract

The Soil Moisture Active Passive (SMAP) mission creates global soil moisture measurements every 2-3 days by spinning a lightweight, ~6 meter diameter deployable mesh reflector. This represents the largest spinning antenna ever to be used on a NASA satellite. The paper discusses the mass properties challenges that were overcome in implementing the mission, including the definition of a combined imbalance term called the Effective Product of Inertia, the selection of an optimum Spun Instrument focal length and edge offset that fostered a reduced mass properties sensitivity, the inclusion of late game Spun Instrument configuration flexibility, the use of balance mass locations that leveraged the large moment arm provided by the reflector, and a subassembly measurement campaign that reduced mass properties uncertainties on testable components.

Pages22
Key Words18. Weight Engineering - Spacecraft Design, 34. Advanced Design
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