The GLAST LAT Instrument Science Operations Center

Computer Science – Performance

Scientific paper

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Scientific paper

The Gamma-ray Large Area Space Telescope (GLAST) is scheduled for launch in late 2007. The major science instrument on GLAST is the Large Area Telescope (LAT). Operations support and science data processing for the LAT instrument on GLAST will be performed by the LAT Instrument Science Operations Center (ISOC) at the Stanford Linear Accelerator Center (SLAC). The ISOC supports GLAST mission operations in cooperation with other GLAST mission ground system elements and supports the science research activities of the LAT collaboration.
The ISOC will be responsible for monitoring the health and safety of the LAT, preparing command loads for the LAT, maintaining and updating embedded flight software which controls the LAT detector and data acquisition flight hardware, maintaining the operating configration of the LAT and its calibration, and applying event reconstruction processing to downlinked LAT data to recover information about detected gamma-ray photons. The SLAC computer farm will be used to process the large volume of LAT event data and generate science products to be made available to the LAT collaboration through the ISOC and to the broader scientific community through the GLAST Science Support Center at GSFC. Science operations in the ISOC will optimize the performance of the LAT and oversee automated science processing of LAT data to detect and monitor transient gamma-ray sources. We describe the use of collaboration-wide data challenges and service challenges to test and exercise LAT data processing and science operations before launch.
This work is supported by Stanford University and the Stanford Linear Accelerator Center (SLAC) under DoE contract number DE-AC03-76SFO0515. Non-US sources of funding also support the efforts of GLAST LAT collaborators in France, Italy, Japan, and Sweden.

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