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FWD: Mars Surveyor Operations Update - January 29, 1999

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  • Frits Westra
    Mars Surveyor Operations Project Status Report Overview Prepared by Mars Surveyor Operations Project Manager
    Message 1 of 1 , Jan 31, 1999
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      Mars Surveyor Operations
      Project Status Report Overview
      Prepared by Mars Surveyor Operations Project Manager
      NASA Jet Propulsion Laboratory

      Friday 29 January 1999

      Mars Global Surveyor

      Mars Global Surveyor has begun the walk-out phase of aerobraking. This
      process was triggered by the apoapsis altitude reaching 1000 km, and
      consists of 4 small propulsive maneuvers (~1 m/s) conducted approximately
      every 24 hours to maintain an orbital lifetime of greater than 48 hours
      while the orbital period approaches 2 hours. The drag passes are occurring
      over the south polar areas where the atmospheric conditions are quite
      variable. This will cause some variability in the timing of the maneuvers.
      At this writing the final termination maneuver (~61 m/s) will occur mid-day
      on Wednesday, February 3rd. The magnetometer/electron reflectometer
      instrument as been turned off as planned. The spacecraft continues to be in
      excellent health.

      Mars Climate Orbiter

      Mars Climate Orbiter continues in quiet cruise mode with nothing significant
      to report.

      Mars Polar Lander

      Mars Polar Lander conducted a set of spacecraft turns to characterize the
      effects of different sun lighting conditions on the performance of it's star
      cameras. This data will be used to select spacecraft orientations that will
      provide for more reliable star camera operation. The spacecraft continues in
      excellent health.
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