NASA NTRS · 19740030011
The SAS-A aspect system
Abstract
On Dec. 12, 1970, the United States Small Astronomy Satellite-A was launched into orbit around the earth. The X-ray instrument carried by the spacecraft was the first satellite instrument to be devoted exclusively to the study of stellar X-ray sources. The primary objective of the instrument was to perform an all-sky survey to detect and locate stellar X-ray sources with location accuracies of one arc-minute for the stronger sources. A system description is given together with details of circuits, alignment procedures, and calibration sequences.
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Jagoda, N., Austin, G., Mickiewicz, S., Goddard, R.. 1973-01-01. The SAS-A aspect system. https://ntrs.nasa.gov/citations/19740030011
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