@misc{indiciae8a5357dff62b,
  title = {GPS as an orbit determination subsystems},
  author = {Fennessey, Richard and Roberts, Pat and Knight, Robin and Vanvolkinburg, Bart},
  year = {1995},
  url = {https://ntrs.nasa.gov/citations/19950021372},
  note = {Source identifier: 19950021372}
}