@misc{indiciae7c2b05ef96b4,
  title = {International GPS Service: life without SA},
  author = {Neilan, R. E. and Moore, A. and Springer, T. and Kouba, J. and Ray, J. and Reigber, C.},
  year = {2000},
  url = {https://ntrs.nasa.gov/citations/20060033388},
  note = {Source identifier: 20060033388}
}