Method and apparatus for creating a compact orbit model is described. Satellite tracking data is obtained having a first set of orbit terms that define a first orbit model. The satellite tracking data is formatted to form formatted data having a second set of orbit terms that define a second orbit model....http://www.google.com/patents/US6829535?utm_source=gb-gplus-sharePatent US6829535 - Method and apparatus for generating satellite tracking information in a compact format
