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Attitude Determination and Control Subsystem (ADCS) preparations for the EPOXI flyby of comet Hartley 2

Show simple item record Luna, Michael E. Collins, Steven M. 2013-10-17T21:08:39Z 2013-10-17T21:08:39Z 2011-08-08
dc.identifier.citation AIAA Guidance, Navigation, and Control Conference, Portland, Oregon, August 8-11, 2011. en_US
dc.identifier.clearanceno 11-2646
dc.description.abstract On November 4, 2010 the former "Deep Impact" spacecraft, renamed "EPOXI" for its extended mission, flew within 700km of comet 103P/Hartley 2. In July 2005, the spacecraft had previously imaged a probe impact of comet Tempel 1. The EPOXI flyby was the fifth close encounter of a spacecraft with a comet nucleus and marked the first time in history that two comet nuclei were imaged at close range with the same suite of onboard science instruments. This challenging objective made the function of the attitude determination and control subsystem (ADCS) critical to the successful execution of the EPOXI flyby. As part of the spacecraft flyby preparations, the ADCS operations team had to perform meticulous sequence reviews, implement complex spacecraft engineering and science activities and perform numerous onboard calibrations. ADCS contributions included design and execution of 10 trajectory correction maneuvers, the science calibration of the two telescopic instruments, an in-flight demonstration of high-rate turns between Earth and comet point, and an ongoing assessment of reaction wheel health. The ADCS team was also responsible for command sequences that included updates to the onboard ephemeris and sun sensor coefficients and implementation of reaction wheel assembly (RWA) de-saturations. 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, 2011. en_US
dc.subject attitude determination and control en_US
dc.subject Deep Impact en_US
dc.subject comets en_US
dc.subject flyby en_US
dc.title Attitude Determination and Control Subsystem (ADCS) preparations for the EPOXI flyby of comet Hartley 2 en_US
dc.type Preprint en_US

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