@misc{indiciaeee0838475c98,
  title = {Spaceborne GPS Current Status and Future Visions},
  author = {Bauer, Frank H. and Hartman, Kate and Lightsey, E. Glenn},
  year = {1998},
  url = {https://ntrs.nasa.gov/citations/19980237248},
  note = {Source identifier: 19980237248}
}