@misc{indiciae2f4eec22a903,
  title = {The Global Positioning System and its application in spacecraft navigation},
  author = {Van Leeuwen, A. and Rosen, E. and Carrier, L. M.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19800040986},
  note = {Source identifier: 19800040986}
}