@misc{indiciaed46994c527e9,
  title = {Ground-Based GPS as a Calibration/Validation Tool for Tropospheric Sensing Instruments},
  author = {Keihm, S. and Haines, B. and Bar-Sever, Y.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20210001143},
  note = {Source identifier: 20210001143}
}