@misc{indiciaef4a38d45dd91,
  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.},
  year = {2003},
  url = {https://ntrs.nasa.gov/citations/20060040050},
  note = {Source identifier: 20060040050}
}