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Gravity Probe B

Testing Einstein's Universe

WEEKLY HIGHLIGHTS FOR WEEK ENDING 09 October 1998:

STANFORD HIGHLIGHT
Mike Irwin, with the support of Rob Brumley and Greg Gutt, integrated the prototype GSS Science Mission High Level Backup (SMHB) analog controller with the prototype low-noise Science Drive amplifiers and successfully suspended the GSS testbed this past weekend. Performance of the backup controller/science amp/testbed system matches simulated results very well. Detailed performance testing is underway; preliminary results show that this backup controller is meeting all its performance requirements. This is the second piece of the three controller backup suite. The third and final piece will be exercised with the testbed in the coming weeks. Photo1: Mike Irwin, Photo 2: Chart-describes gyro simulator levitation

SPACE VEHICLE HIGHLIGHT
A successful Relativity Mission battery Critical Design Review (CDR) was held in Colorado Springs at Eagle Pitcher, the battery subcontractor. A productive working session was held following the review to work open issues. A well-defined list of actions was created to guide the open issues to closure. Photo: The Relativity Mission Battery CDR Team: Marc Campell, Gary Mason, Ken Shaul, Shawkey Shehata, Rusty Gray and Lim Mar.

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