@misc{indiciae2ce9d237d5e3,
  title = {Proportionality between Doppler noise and integrated signal path electron density validated by differenced S-X range},
  author = {Berman, A. L.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770014187},
  note = {Source identifier: 19770014187}
}