Ground System:
<ul><li>The OPALS ground system will be at the Optical Communications Telescope Laboratory (OCTL) at the JPL facilities on Table Mountain in Wrightwood, CA. It utilizes OCTL's 1-meter primary telescope aperture to receive the downlink signal and transmit the reference beacon. The received optical signal is acquired and focused onto a photodetector, which converts the optical signal to baseband electrical current. After necessary digitization, synchronization, error-correction and post-processing, the video file is displayed on a monitor. The OCTL telescope relies on orbital predictions built from ISS GPS state vectors to follow the ISS as it traverses its path across the sky.</li></ul>
NASA/Jet Propulsion Laboratory
<ul><li><bdo lang="en" dir="ltr" title="archived on 24 December 2016 at the Wayback Machine"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20161224161054/http://phaeton.jpl.nasa.gov/external/projects/optical.cfm">Optical PAyload for Lasercomm Science (OPALS)</a></bdo></li>
<li><bdo lang="en" dir="ltr" title="archived on 18 July 2016 at the Wayback Machine"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20160718034942/http://opticalcomm.jpl.nasa.gov/PAPERS/REVIEW/overview.pdf">Overview.pdf, Page 19</a></bdo></li></ul>