TY - RPRT TI - Spacecraft preliminary orbit determination using tracking measurements obtained from the Tracking and Data Relay Satellite System (TDRSS) and the Ground Spaceflight Tracking and Data Network (GSTDN) AU - Kirschner, S. M. AU - Beri, A. C. AU - Broaddus, S. R. AU - Doll, C. E. PY - 1990 UR - https://ntrs.nasa.gov/citations/19910027697 ID - 19910027697 ER -