@misc{indiciae5ca61f571a6a,
  title = {Ranging and tracking system for proximity operations, phase 1},
  author = {Udalov, S. and Nilsen, P. W.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19790011017},
  note = {Source identifier: 19790011017}
}