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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <TITLE>Abstract AAS 97-607</TITLE> </HEAD> <BODY BGCOLOR="ffffff"> <h2>AAS 97-607</h2> <h2>A DYNAMIC ALGORITHM FOR PROCESSING UNCORRELATED TRACKS</h2> <h4> K.T. Alfriend - Texas A&M University </h4> <h2> Abstract </h2> Tracks of space objects which do not correlate to a known space object are called uncorrelated tracks (UCTs). The association of UCTs to develop an ephemeris, and subsequently a new catalogued object, has typically been a manual process which requires significant time by the analysts. The algorithm used for track association is a static algorithm in that it does not directly take into consideration the uncertainties in the ephemerides determined from the individual tracks. In this paper a dynamic algorithm based on the track uncertainty (covariance) is proposed and analyzed. The efficacy of the algorithm is based on two new properties: a) The volume of the equiprobability ellipsoid is constant in time, even though the shape changes, and b) The probability of association is maximized by using this ellipsoid for association.