@misc{indiciaefa26e512bbb8,
  title = {An Internet-based Global Differential GPS System, Initial Results},
  author = {Dong, D. and Stowers, D. and Lough, M. and Bertiger, W. and Muellerschoen, R.},
  year = {2000},
  url = {https://ntrs.nasa.gov/citations/20210002318},
  note = {Source identifier: 20210002318}
}