Fine Pointing Of The Solar Optical Telescope In The Space Shuttle Environment

Sankaran Gowrinathan

doi:10.1117/12.964430

1 February 1987 Fine Pointing Of The Solar Optical Telescope In The Space Shuttle Environment

Sankaran Gowrinathan

Proceedings Volume 0641, Acquisition, Tracking, and Pointing; (1987) https://doi.org/10.1117/12.964430
Event: 1986 Technical Symposium Southeast, 1986, Orlando, United States

Abstract

Instruments attached to the payload bay of the Space Shuttle require special attention where fine pointing is involved. Fine pointing, for purposes of this discussion, is defined as sub-arc second pointing. Instruments requiring such fine pointing (Solar Optical Telescope and Shuttle Infrared Telescope, for example) will require two stages of pointing (coarse and fine). Coarse pointing will be performed by a gimbal system such as the Instrument Pointing System (IPS). Fine pointing will be provided by image motion compensation (IMC). Most forms of IMC involve adjustable optical elements in the optical system to compensate for fast transient disturbances. This paper describes work performed on the Solar Optical Telescope (SOT) concept design that illustrates IMC as applied to SOT. The fine pointing requirements on SOT dictate use of IMC at about 20 Hz. bandwidth. It will be shown that the need for this high bandwidth is related to shuttle-induced disturbances. Shuttle-induced disturbances are primarily due to two sources; man push-offs and vernier thruster firings. Both disturbance sources have high-frequency content that drive the IMC bandwidth.

Citation Download Citation

Sankaran Gowrinathan "Fine Pointing Of The Solar Optical Telescope In The Space Shuttle Environment", Proc. SPIE 0641, Acquisition, Tracking, and Pointing, (1 February 1987); https://doi.org/10.1117/12.964430

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