@misc{indiciae488f80e56e0b,
  title = {A Costas loop with tangent error signal for use in Navstar GPS avionics},
  author = {Painter, J. H. and Mcclung, D. A. and Reininger, R. C.},
  year = {1978},
  url = {https://ntrs.nasa.gov/citations/19780065949},
  note = {Source identifier: 19780065949}
}