@misc{indiciae3f8158bc27c6,
  title = {Spaceborne low frequency radar sounding: an engineering perspective},
  author = {Safaeinili, A. and Jordan, R. L. and Johnson, W. T. K.},
  year = {2001},
  url = {https://ntrs.nasa.gov/citations/20060031311},
  note = {Source identifier: 20060031311}
}