@misc{indiciae45de301aa077,
  title = {Ionospheric refraction effects on orbit determination using the orbit determination error analysis system},
  author = {Yee, C. P. and Kelbel, D. A. and Lee, T. and Dunham, J. B. and Mistretta, G. D.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910007769},
  note = {Source identifier: 19910007769}
}