<h2>AAS 95-386</h2><h2>Application of Precision Orbit Determination Techniques to Tracking and Prediction of Multiple Space Objects</h2><h4>C. K. Shum, B. D. Tapley, J. C. Ries and J. Casey, Center for Space Research, The University of Texas, Austin, TX</h4><h2> Abstract </h2>In this paper, the techniques used for precision orbit determination are applied to the problem of tracking and prediction of multiple space objectives with the objective of achieving accurate satellite states with computational efficiency.  The techniques employed here include a pure numerical integration of the satellite equations of motion and the use of state-of-the-art force and measurement models.  The batch-estimated accuracy of some low-altitude, well-tracked geodetic satellite orbits is about 30 cm in position error.  Prediction accuracy is typically around 1,500 m for a one month time span.  The effect of geopotential model accuracy and other effects such as drag on these geodetic satellite orbits will be assessed.<br><br>