@misc{indiciae416e71d221ba,
  title = {GPS-based orbit determination and point positioning under selective availability},
  author = {Bar-Sever, Yoaz E. and Yunck, Thomas P. and Wu, Sien-Chong},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19920034312},
  note = {Source identifier: 19920034312}
}