@misc{indiciae4acca88443e2,
  title = {Sensor Tracks the Sun From Any Angle},
  author = {Birnbaum, M., M. and Bunker, R. L.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19850000308},
  note = {Source identifier: 19850000308}
}