@misc{indiciae5ff68e9ad886,
  title = {High-precision orbit determination for high-earth elliptical orbiters using the Global Positioning System},
  author = {Lichten, S. M. and Estefan, J. A.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900065972},
  note = {Source identifier: 19900065972}
}