@misc{indiciaeb708e244a741,
  title = {Errors in GPS due to Satellite C1-P1 Code Biases},
  author = {Muellerschoen, R. and Powers, E.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20060034246},
  note = {Source identifier: 20060034246}
}