US: Satellite tracking using non-imaging passive sensors
A March 2008 research paper presents techniques for tracking satellites using passive sensors without imaging capabilities. The study covers both highly elliptical and geosynchronous orbits for target identification.
Background
In March 2008, scientists completed a 112-page technical analysis of space-based tracking systems utilizing non-imaging passive sensors. The research develops dual methodologies for initial orbit determination of targets in highly elliptical and geosynchronous orbits. One approach applies Gaussian initial orbit determination using angular measurement data, while the second employs positional information relative to Earth's background. These estimates undergo refinement through non-linear least squares routines to match entries in the Air Force Space Command satellite catalog. The work demonstrates advanced algorithms for characterizing objects detected by defense satellite systems.