Changing software philosophy for ACIS operations as Chandra ages

Nancy R. Adams-Wolk; Paul P. Plucinsky; Joseph DePasquale

doi:10.1117/12.789450

12 July 2008 Changing software philosophy for ACIS operations as Chandra ages

Nancy R. Adams-Wolk, Paul P. Plucinsky, Joseph DePasquale

Proceedings Volume 7016, Observatory Operations: Strategies, Processes, and Systems II; 70161J (2008) https://doi.org/10.1117/12.789450
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

The Chandra X-Ray Observatory is about to start its 10th year of operations. Over the time of the mission, the Science Operations Team, ACIS (Advanced CCD Imaging Spectrometer) Operations group, has participated in spacecraft command load reviews. These reviews ensure the spacecraft commanding is safe for the instrument and the ACIS configuration matches the planned observation. The effectiveness of spacecraft command load reviews for ACIS depends on the ability to adapt the software as operations change in response to the aging of the spacecraft. We have recently rewritten this software to start incorporating other spacecraft subsystems, including maneuvers and hardware commanding, to ensure the safety of ACIS. In addition, operational changes that optimize the science return of the spacecraft have created new constraints on commanding. This paper discusses the reorganization of the code and the multiple changes to the philosophy of the code. The result is stronger, more flexible software that will continue to assist us in protecting ACIS throughout the Chandra mission.

Citation Download Citation

Nancy R. Adams-Wolk, Paul P. Plucinsky, and Joseph DePasquale "Changing software philosophy for ACIS operations as Chandra ages", Proc. SPIE 7016, Observatory Operations: Strategies, Processes, and Systems II, 70161J (12 July 2008); https://doi.org/10.1117/12.789450

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KEYWORDS

Space operations

X-ray sources

Databases

Photons

Solids

Charge-coupled devices

Safety

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