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Gravity Probe B

Testing Einstein's Universe

WEEKLY HIGHLIGHTS FOR WEEK ENDING 23 MARCH 2001:

PAYLOAD CONFIDENCE TEST IN-PROGRESS
The payload test team has begun the post-acoustic confidence test. The four flight SQUIDs have been successfully tested. The SQUID tests included flux locking and dc coupling verification between the SQUIDs and gyroscope pickup loops. The cable checkout of the instrumentation and suspension lines are in-progress.

Photo: A SQUID prototype unit.

COMPLETED ACE BOX ACCEPTANCE DATA REVIEW
The ACE box sucessfully completed its testing and Acceptance Data Review following replacement of the Interpoint DC-DC converters at Spectrum Astro in Gilbert, Arizona. The ACE is now in GP-B Flight Stores awaiting installation on the spacecraft.

Photo: LM Engineer Tan Nguyen inspecting the PDU in 1998.

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