@misc{indiciaee80eecda2db9,
  title = {Utilizing GPS to Determine Ionospheric Delay over the Ocean},
  author = {Katzberg, Stephen J. and Garrison, James L., Jr.},
  year = {1996},
  url = {https://ntrs.nasa.gov/citations/19970005019},
  note = {Source identifier: 19970005019}
}