@misc{indiciae843369e7c0cf,
  title = {Satellite-to-satellite tracking experiment for global gravity field mapping},
  author = {Upadhyay, Triveni N. and Jekeli, Christopher},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900011240},
  note = {Source identifier: 19900011240}
}