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Satellite Drag in the Re-entry Region

Focus Area VIII: Satellite Drag in the Re-Entry Region. MotivationAccurate knowledge of satellite CD is essential for accurate prediction of satellite drag, and for inferring densities from accelerometer measurementsInsufficient knowledge exists about CD in the transition and slip-flow regimes (i.e., < 150 km) .

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Satellite Drag in the Re-entry Region

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    1. Satellite Drag in the Re-entry Region Brian Argrow Dept. Aerospace Engineering Sciences University of Colorado NADIR MURI 21 October 2008

    3. Methodology Direct Simulation Monte Carlo (DSMC) with calibrated gas-surface interaction models Bird’s DS3V NASA DSMC Analysis Code (DAC) Investigate gas surface interaction models and produce calibrated modules to couple with DSMC

    10. Year 1 Summary Hywapyong Ko, PhD candidate (started Aug 08) Simulations of simple geometries with DS3V Paperwork completed for DAC97 (July 08) Dedicated 8-processor workstation Year 2 Focus Development of DAC + gas/surface modeling New course on Molecular Gas Dynamics (Sp 09)

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