@misc{indiciae024da9d0e475,
  title = {The Global Positioning System},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1999},
  doi = {10.3133/fs06299},
  url = {https://pubs.usgs.gov/publication/fs06299},
  note = {Source identifier: fs06299}
}