@misc{indiciaedc29fa8c7cc8,
  title = {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)},
  author = {Kirschner, S. M. and Beri, A. C. and Broaddus, S. R. and Doll, C. E.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910027697},
  note = {Source identifier: 19910027697}
}