@misc{indiciae75f8e25918f9,
  title = {Estimating Baselines From Constrained Data On GPS Orbits},
  author = {Lindqwister, Ulf J. and Lichten, Stephen M. and Blewitt, Geoffrey I.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910000576},
  note = {Source identifier: 19910000576}
}