How NASA uses simple technology to track lunar missions

NASA is using a simple but effective technology called Laser Retroreflective Arrays (LRAs) to determine the locations of lunar landers more accurately. They will be attached to most of the landers from United States companies as part of NASA's Commercial Lunar Payload Service (CLPS) initiative. LRAs are inexpensive, small, and lightweight, allowing future lunar orbiters or landers to locate them on the moon.