A remarkable collection of multiple observatories, located atop the 10,000-foot summit of Mount Haleakala. The TLRS-4 facility, for example, in what was called the Lunar Ranging Experiment (LURE), bounced lasers off reflectors left on the moon, to measure tectonic movement on earth. The Air Force Maui Optical Station and Supercomputing Site (AMOS), is comprised of the Maui Space Surveillance Complex (MSSC), and the Maui High Performance Computing Center (MHPCC). The Maui Space Surveillance System (MSSS) contained within the Maui Space Surveillance Complex (MSSC), consists of multiple optical telescopes, including the largest optical telescope designed to track satellites, known as the Advanced Electro-Optical System (AEOS). Also on site is a Ground-based Electro-Optical Deep Space Surveillance (GEODSS) facility overseen by the U.S. Air Force Space Command. In 1996, NASA's Jet Propulsion Lab installed a system using one of this station's 39-inch telescopes to monitor space for asteroids that might pose the threat of a collision with Earth, as part of NASA's Near Earth Asteroid Tracking program (NEAT). Over 40,000 asteroids had been photographed and logged before the NEAT program was cancelled. The Mees Solar Observatory is also to be found here.