@misc{indiciae73baead7d58f,
  title = {How well can gravity be recovered using Topex and GPS data?},
  author = {Bertiger, Willy and Wu, Sien-Chong and Wu, J. T. and Skrumeda, Lisa},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900059707},
  note = {Source identifier: 19900059707}
}