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Gravity Probe B

Testing Einstein's Universe

WEEKLY HIGHLIGHTS FOR WEEK ENDING 4 June 1999:

STANFORD HIGHLIGHT
The team of Jim Lockhart and Dean Yon have successfully certified 4 sets of Revision C SQUID readout electronics for use in the upcoming payload verification test. Each set of electronics includes a forward box, an aft box, the forward to tophat cables, and the forward to aft cables. The test bed for this testing included a flight-like SQUID package operated at 4.2 K. In addition, tests are in progress using this test bed with the flight equivalent SRE.

Photo: The SQUID readout electronics and associated cables.

SPACE VEHICLE HIGHLIGHT
The Relativity Mission flight Attitude Control Electronics (ACE) is currently in functional checkout in the Integrated Test Facility (ITF) in LMMS building 251. ACE interfaces to the thrusters, thruster isolation valves, magnetic torquers, and sun sensor have been successfully tested.
Photo: LMMS engineer Paul Dulgov testing the Relativity Mission Attitude Control Electronics in the Integrated Test Facility.

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