@misc{indiciae0a6437b12646,
  title = {Signature extension for sun angle, volume 1},
  author = {Smith, J. A. and Berry, J. K. and Heimes, F.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19760014551},
  note = {Source identifier: 19760014551}
}