@misc{indiciae24e9e0ecff4c,
  title = {Validating the airborne and ground based components of a differential GPS system},
  author = {Edwards, F. G. and Hegarty, D. M. and Turner, R. N. and Van Graas, F. and Sharma, S.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19880064479},
  note = {Source identifier: 19880064479}
}