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Titan atmospheric density reconstruction using Cassini guidance, navigation, and control data

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dc.contributor.author Sarani, Siamak
dc.date.accessioned 2015-06-09T17:38:33Z
dc.date.available 2015-06-09T17:38:33Z
dc.date.issued 2009-08-10
dc.identifier.citation 17th AIAA Guidance, Navigation and Control Conference and Exhibit, Chicago, Illinois, August 10-13, 2009 en_US
dc.identifier.clearanceno 09-2660
dc.identifier.uri http://hdl.handle.net/2014/45233
dc.description.abstract Titan, the largest moon of Saturn, is the only known moon in the Solar System with a significant atmosphere. The variation of Titan’s atmospheric density with altitude is the focus of many past and present science investigations. During a low-altitude Titan flyby, attitude control thrusters on the Cassini spacecraft are fired to overcome the torque imparted on the spacecraft due to the Titan atmosphere, as well as to slew the spacecraft in order to meet the pointing needs of the science instruments. This paper describes a novel methodology that uses guidance, navigation, and control data to estimate the external torque imparted on the spacecraft due to the Titan atmosphere. The Titan atmospheric density is determined accordingly. The methodology described has already been used to reconstruct the Titan atmospheric density for all low-altitude Titan flybys of the Cassini spacecraft in 2004–2008 and most part of 2009. It will be used on all remaining low-altitude Titan flybys in the extended missions of Cassini spacecraft. With some modifications, the described methodology could also be used to reconstruct the Titan atmosphere density using data to be collected by a planned Titan Orbiter. 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, 2009 en_US
dc.subject Atmospheric Torque en_US
dc.subject Cassini Attitude and Articulation Control Subsystem en_US
dc.title Titan atmospheric density reconstruction using Cassini guidance, navigation, and control data en_US
dc.type Preprint en_US


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