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Proceedings Paper

Cassini stellar reference unit: performance test approach and results
Author(s): Valerie C. Thomas; Randel C. Blue; Dorico Procopio
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Paper Abstract

The Cassini Stellar Reference Unit (SRU) is the prime attitude determination sensor on the Cassini spacecraft. It must operate continuously and reliably during both the cruise and the Saturnian tour phases of the mission. In fact, accuracy requirements are most critical toward the end of the mission, during the four years of scientific observations at Saturn. To ensure that the SRU will operate within specification for the entire mission, an extensive test program has been undertaken to characterize the SRU performance prior to launch and to quantify any expected performance degradation. Results from several complimentary test programs are presented and compared with pre-test performance predictions. Additionally, a unique approach is described for enabling closed-loop testing of the SRU with the other elements of the Cassini Attitude and Articulation Control Subsystem when no optical stimulation is available.

Paper Details

Date Published: 7 October 1996
PDF: 11 pages
Proc. SPIE 2803, Cassini/Huygens: A Mission to the Saturnian Systems, (7 October 1996); doi: 10.1117/12.253428
Show Author Affiliations
Valerie C. Thomas, Jet Propulsion Lab. (United States)
Randel C. Blue, Jet Propulsion Lab. (United States)
Dorico Procopio, Officine Galileo (Italy)

Published in SPIE Proceedings Vol. 2803:
Cassini/Huygens: A Mission to the Saturnian Systems
Linda Horn, Editor(s)

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