@misc{indiciaec8de6f70c699,
  title = {Modified reference SPS with solid state transmitting antenna},
  author = {Woodcock, G. R. and Sperber, B. R.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19820004693},
  note = {Source identifier: 19820004693}
}