@misc{indiciae571d3ff7b756,
  title = {Precision orbit determination software validation experiment},
  author = {Schutz, B. E. and Tapley, B. D. and Eanes, R. J. and Marsh, J. G. and Williamson, R. G. and Martin, T. V.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19810040391},
  note = {Source identifier: 19810040391}
}