@misc{indiciae23de2a491468,
  title = {Engineering calculations for communications satellite systems planning},
  author = {Walton, E. and Aebker, E. and Mata, F. and Reilly, C.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920004130},
  note = {Source identifier: 19920004130}
}