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Mission Status 2010
Kevin V. Gilliland Stardust Spacecraft Team
January 13, 2010
All subsystems are nominal. The most recent pass was this morning, and the next pass is Friday, January 15.
Commands were sent to keep the processor at its high processing speed, 20MHz. Using the higher speed helps maintain favorable temperatures on the input/output card. Early in the mission, Thermal engineers discovered a range of temperatures where the card was vulnerable to hanging up and required a reset. Project scientists met last week to present Tempel-1 observation data, and will complete their study by the end of this week. Navigation is working on designing the Tempel-1 targeting maneuver, TCM-28, which will execute Wednesday, February 17. The maneuver may include an adjustment to the time of arrival at Tempel-1, depending upon the recommendation from the observation scientists.
January 6, 2010
All subsystems are nominal. We have had two contacts since the previous report. The next contact will be tonight.
Smooth control on string 2 thrusters continues. Occasionally, the Attitude Control Performance Monitor (ACPM) detects Z-axis control fault counts. These occur periodically, due to noisy attitude and rate data as determined by the Star Camera. The duration, typically 1 or 2 seconds, is well below the 35 second fault threshold. The current background sequence is SN032. SN033 is in development. This week, project scientists are meeting to present Tempel-1 observation data. With recent Earth-based observations, a recommendation will be made to the project for an adjustment to Stardust NExT’s time of arrival at the comet February 14, 2011. The maneuver will be executed in February, almost one year before Encounter.
