@misc{indiciae273bba7afc40,
  title = {Characterizing the dependence of satellite-based augmentation systems upon the spatial distribution of GPS measurements},
  author = {Sparks, L. and Komjathy, A. and Mannucci, A. J. and Pi, X.},
  year = {2003},
  url = {https://ntrs.nasa.gov/citations/20060040021},
  note = {Source identifier: 20060040021}
}