GLAST Large Area Telescope:

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Presentation transcript:

GLAST Large Area Telescope: I&T Integration Kickoff Meeting Overview March 9th, 2004 Pat Hascall SLAC System Engineering Manager hascallp@slac.stanford.edu 650-926-4266 Gamma-ray Large Area Space Telescope

Topics Test plan flow Strategy for completion Documentation Schedules

Test Planning Flow

Strategy for Completion Phased approach to provide planning necessary for first 6 months of integration Focus is on Calorimeter and Tracker first, followed by DAQ boxes, then ACD

Near Term Test Planning Flow

LAT Assembly Sequence LAT Assembly Sequence LAT-MD-00676 Contents Defines in detail the sequence of operations necessary to integrate the LAT Focuses on mechanical operations, and calls out electrical tests to be run from separate procedures Status Draft completed, some refinement needed Schedule Personnel reprioritized, ETC TBD Mitigation Sufficient detail available to proceed, remaining work is primarily clean up

LAT Performance and Operations Test Plan LAT Performance and Operations Test Plan LAT-MD-02730 Contents Defines at a high level each of the individual tests (e.g. TE103, Tracker Bias Current) Define when the test will be run (Functional Test, Comprehensive Test, Integration test …) Status Draft initiated (samples on next viewgraphs) Details worked in weekly meetings with I&T and subsystems Will include definition of 2 tower test derived from End-to-End Committee results Schedule First cut out by end of month as part of an incremental release series Mitigation Information generated by a team effort (including members of End-to-End Committee), so test development can proceed in parallel

Test Definition Sample Tracker GTRC configuration register and readback The GTRC chips are sequentially addressed and their configuration registers loaded with a bit pattern. Each time the register is read back and checked for errors. The test is repeated with the complement of the bit pattern. The test then is repeated with a broadcast address for writing the register, followed by sequential readback. (Based on Tracker Test TE201) FSW Tracker Configuration Test This test shall verify the ability of the SIU to configure the TKR subsystem as desired and read back the necessary configuration information to completely determine the TKR subsystem configuration (Based on FSW test 7b)

Test Instance Format Sample

Integration Drawings Integration Drawings Contents Defines how the pieces delivered to I&T relate and provides some assembly information In some cases, provide a model with internal details removed to facilitate model usage (outline drawings) Status Drawing tree defined Model and drawing completion on hold Schedule Will take approximately 2 months after effort is restarted to complete model integration and drawings Mitigation Many of the models can be used now to get views necessary for integration procedures

Drawing Tree