@misc{indiciae0284a305e33a,
  title = {Optical Calibration Phase Locked Loop for the Shuttle Radar Topography Mission},
  author = {McWatters, D. and Lutes, G. and Caro, E. and Tu, M.},
  year = {2000},
  url = {https://ntrs.nasa.gov/citations/20060032232},
  note = {Source identifier: 20060032232}
}