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Jitter Test Program and On-Orbit Mitigation Strategies for Solar Dynamic ObservatoryThe Solar Dynamic Observatory (SDO) aims to study the Sun's influence on the Earth, the source, storage, and release of the solar energy, and the interior structure of the Sun. During science observations, the jitter stability at the instrument focal plane must be maintained to less than a fraction of an arcsecond for two of the SDO instruments. To meet these stringent requirements, a significant amount of analysis and test effort has been devoted to predicting the jitter induced from various disturbance sources. This paper presents an overview of the SDO jitter analysis approach and test effort performed to date. It emphasizes the disturbance modeling, verification, calibration, and validation of the high gain antenna stepping mechanism and the reaction wheels, which are the two largest jitter contributors. This paper also describes on-orbit mitigation strategies to protect the system from analysis model uncertainties. Lessons learned from the SDO jitter analyses and test programs are included in the paper to share the knowledge gained with the community.
Document ID
Document Type
Conference Paper
Liu, Kuo-Chia
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kenney, Thomas
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Maghami, Peiman
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mule, Pete
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Blaurock, Carl
(Nightsky Systems Raleigh, NC, United States)
Haile, William B.
(ATK Space Systems, Inc. Beltsville, MD, United States)
Date Acquired
August 24, 2013
Publication Date
September 24, 2007
Publication Information
Publication: Proceedings of the 20th International Symposium on Space Flight Dynamics
Subject Category
Spacecraft Design, Testing And Performance
Distribution Limits
Public Use Permitted.
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