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Proceedings Paper

The Chandra X-ray Center data system: supporting the mission of the Chandra X-ray Observatory
Author(s): Janet D. Evans; Mark Cresitello-Dittmar; Stephen Doe; Ian Evans; Giuseppina Fabbiano; Gregg Germain; Kenny Glotfelty; Diane Hall; David Plummer; Panagoula Zografou
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Paper Abstract

The Chandra X-ray Center Data System provides end-to-end scientific software support for Chandra X-ray Observatory mission operations. The data system includes the following components: (1) observers' science proposal planning tools; (2) science mission planning tools; (3) science data processing, monitoring, and trending pipelines and tools; and (4) data archive and database management. A subset of the science data processing component is ported to multiple platforms and distributed to end-users as a portable data analysis package. Web-based user tools are also available for data archive search and retrieval. We describe the overall architecture of the data system and its component pieces, and consider the design choices and their impacts on maintainability. We discuss the many challenges involved in maintaining a large, mission-critical software system with limited resources. These challenges include managing continually changing software requirements and ensuring the integrity of the data system and resulting data products while being highly responsive to the needs of the project. We describe our use of COTS and OTS software at the subsystem and component levels, our methods for managing multiple release builds, and adapting a large code base to new hardware and software platforms. We review our experiences during the life of the mission so-far, and our approaches for keeping a small, but highly talented, development team engaged during the maintenance phase of a mission.

Paper Details

Date Published: 29 June 2006
PDF: 11 pages
Proc. SPIE 6270, Observatory Operations: Strategies, Processes, and Systems, 62700N (29 June 2006); doi: 10.1117/12.672660
Show Author Affiliations
Janet D. Evans, Smithsonian Astrophysical Observatory (United States)
Mark Cresitello-Dittmar, Smithsonian Astrophysical Observatory (United States)
Stephen Doe, Smithsonian Astrophysical Observatory (United States)
Ian Evans, Smithsonian Astrophysical Observatory (United States)
Giuseppina Fabbiano, Smithsonian Astrophysical Observatory (United States)
Gregg Germain, Smithsonian Astrophysical Observatory (United States)
Kenny Glotfelty, Smithsonian Astrophysical Observatory (United States)
Diane Hall, Smithsonian Astrophysical Observatory (United States)
David Plummer, Smithsonian Astrophysical Observatory (United States)
Panagoula Zografou, Smithsonian Astrophysical Observatory (United States)


Published in SPIE Proceedings Vol. 6270:
Observatory Operations: Strategies, Processes, and Systems
David R. Silva; Rodger E. Doxsey, Editor(s)

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