@misc{indiciae77bf48eea264,
  title = {Field test of two single-frequency GPS receivers},
  author = {E.Y. Iwatsubo},
  year = {1996},
  doi = {10.3133/ofr9643},
  url = {https://pubs.usgs.gov/publication/ofr9643},
  note = {Source identifier: ofr9643}
}