Precision pointing and image stabilization for the transition region and coronal explorer solar observatory

Details Precision pointing and image stabilization for the transition region and coronal explorer solar observatory Precision pointing and image stabilization for the transition region and coronal explorer solar observatory

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996spie.2739...77z&link_type=abstract

Proc. SPIE Vol. 2739, p. 77-88, Acquisition, Tracking, and Pointing X, Michael K. Masten; Larry A. Stockum; Eds.

Physics

Scientific paper

This paper presents a detailed description of the precision pointing system and the image stabilization system (ISS) for the Transition Region and Coronal Explorer (TRACE) satellite mission. The TRACE spacecraft is the fourth in NASA's small explorer series of missions and is scheduled for launch in September 1997. The primary TRACE science objective is to explore the relationship between the fine scale magnetic fields in the solar surface and features in the photosphere, chromosphere, transition region and corona. Quantitative images of these regions will be collected and used to study the structure and evolution of the sun's magnetic field with a spatial and temporal resolution of one arc-second and one second, respectively. TO meet the science objectives, the instrument payload and the spacecraft attitude control system are coupled using a guide telescope. The guide telescope provides both the targeting mechanism and pointing error signals for the spacecraft feedback control system. In addition, the guide telescope generates signals used to control the active mirror of the ISS. Simulation results show that precision target pointing is maintained to less than 5 arc-seconds, while analysis indicates that the ISS reduces image motion jitter below the 0.1 arc- second level.

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