@misc{indiciaec1d92be94e35,
  title = {Phase Sensor for Aligning a Segmented Telescope Mirror},
  author = {Stahl, Philip and Walker, Chanda Barlett},
  year = {2006},
  url = {https://ntrs.nasa.gov/citations/20110013584},
  note = {Source identifier: 20110013584}
}