@misc{indiciaea158b2f6d119,
  title = {What are Phase-Center Variations and Why Should I Worry?},
  author = {Clark, T. A. and Schupler, B. R.},
  year = {1996},
  url = {https://ntrs.nasa.gov/citations/19980000366},
  note = {Source identifier: 19980000366}
}