@misc{indiciae724146ee4c4b,
  title = {Observation model and parameter partials for the JPL geodetic GPS modeling software GPSOMC},
  author = {Sovers, O. J. and Border, J. S.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19890014689},
  note = {Source identifier: 19890014689}
}