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Mars Surveyor 98 Update - April 29, 1999

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  • Frits Westra
    MARS SURVEYOR 98 MISSION STATUS April 29, 1999Mars Climate Orbiter (MCO)/Mars Polar Lander (MPL)Both the MCO and MPL spacecraft continue to perform well
    Message 1 of 1 , May 1, 1999
      April 29, 1999

      Mars Climate Orbiter (MCO)/Mars Polar Lander (MPL)

      Both the MCO and MPL spacecraft continue to perform well in cruise. The
      flight team is gradually turning its focus from ongoing cruise operations
      to preparations for the arrival of the two spacecraft at Mars this fall.

      The atttide determination and control group is nearing completion of an
      extensive series of tests in the MCO ground-based simulator, in preparation
      for an in-flight test of the "all-stellar" mode. The in-flight checkout is
      being delayed by one week (from May 3-7 to May 10-14) for some additional
      testing to first be completed, in order to ensure a smooth flight test and
      transition into this new mode. Another significant test activity nearing
      completion is stress-testing of the Mars Orbit Insertion (MOI) software and
      command sequence. The test team reports that, thus far, all of the MOI
      stress tests run in the MCO simulator have been successful in dealing with
      a variety of simulated sensor failures and off-nominal conditions.

      For more information on the Mars Surveyor 98 missions, please visit
      our website at:

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