@misc{indiciae3a0dba809148,
  title = {Bottom and Topside Ionospheric TEC Measured with Groundbased Ionosondes},
  author = {Reinisch, Bodo and Huang, Xue-Qin},
  year = {2001},
  url = {https://ntrs.nasa.gov/citations/20050206400},
  note = {Source identifier: 20050206400}
}