@misc{indiciae5fd8a180e7c9,
  title = {Orbit determination of highly elliptical Earth orbiters using improved Doppler data-processing modes},
  author = {Estefan, J. A.},
  year = {1995},
  url = {https://ntrs.nasa.gov/citations/19950015116},
  note = {Source identifier: 19950015116}
}