@misc{indiciaebc66f08efab4,
  title = {Improved modeling of GPS selective availability},
  author = {Braasch, Michael S. and Fink, Annmarie and Duffus, Keith},
  year = {1994},
  url = {https://ntrs.nasa.gov/citations/19940022787},
  note = {Source identifier: 19940022787}
}