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Estimation of gravitation parameters of Saturnian moons using Cassini attitude control flight data

Show simple item record Krening, Samantha C. 2014-02-21T17:38:34Z 2014-02-21T17:38:34Z 2013-08-19
dc.identifier.citation 2013 AIAA Guidance, Navigation, and Control Conference, Boston, Massachusetts, August 19 - 22, 2013 en_US
dc.identifier.clearanceno CL#13-2757
dc.description.abstract A major science objective of the Cassini mission is to study Saturnian satellites. The gravitational properties of each Saturnian moon is of interest not only to scientists but also to attitude control engineers. When the Cassini spacecraft flies close to a moon, a gravity gradient torque is exerted on the spacecraft due to the mass of the moon. The gravity gradient torque will alter the spin rates of the reaction wheels (RWA). The change of each reaction wheel’s spin rate might lead to overspeed issues or operating the wheel bearings in an undesirable boundary lubrication condition. Hence, it is imperative to understand how the gravity gradient torque caused by a moon will affect the reaction wheels in order to protect the health of the hardware. The attitude control telemetry from low-altitude flybys of Saturn’s moons can be used to estimate the gravitational parameter of the moon or the distance between the centers of mass of Cassini and the moon. Flight data from several low altitude flybys of three Saturnian moons, Dione, Rhea, and Enceladus, were used to estimate the gravitational parameters of these moons. Results are compared with values given in the literature. 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 angular momentum en_US
dc.subject Rhea en_US
dc.subject Dione en_US
dc.subject Enceladus en_US
dc.subject gravity gradient torque en_US
dc.subject attitude control en_US
dc.subject reaction wheel en_US
dc.subject gravitational parameter en_US
dc.title Estimation of gravitation parameters of Saturnian moons using Cassini attitude control flight data en_US
dc.type Preprint en_US

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