@misc{indiciaea30531f40ba3,
  title = {Novel Concepts for Precise Low Earth Orbiter Navigation With GPS},
  author = {Thornton, C. L. and Yunck, T. P.},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/20210005289},
  note = {Source identifier: 20210005289}
}