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Operations CXO Status Report

Saturday 14 August 1999 7.00am EST

The Chandra mission continues to proceed nominally.

The following is an overview of the events that occurred over the last 24 hours.

Perform IRU Scale Factor misalignment procedure - Perform maneuvers to determine Gyro frame misalignment matrix, and successfully update Gyro to Aspect Camera Assembly Transformation Matrix.

The Optical Cavity pressure in down to 4.5X10-06. The HRC I and S detectors high voltage were successfully raised to their full potential of 1520kV and 1760kV respectfully for the first time on-orbit.

Completed Normal Pointing Mode Checkout - Demonstrated normal Pointing Control and Aspect Determination (PCAD) operations, including maneuvering, auto-transfer to Normal Pointing mode, Orbital Flight Program (OFP) commanded search for stars (based on OFP star catalog) and FID lights, and Kalman filter operations with and without dithering.

Transfer to Chandra Phase II timeline. Upload Offline System mission load for 40 hour period starting 6:45am EDT Saturday.

Offline System (OFLS) scheduling of mission loads. Started performing maneuvers and test observations controlled from onboard Real Time Sequences (RTS) derived in the OFLS instead of real time ground commands. This load will control the Chandra until about midnight Sunday.

Activities for next 24 hours.
  • Continue on-board RTS directed Chandra operations.

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