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How NASA uses simple technology to track lunar missions

How NASA uses simple technology to track lunar missions

This photograph shows a mockup laser retroreflector array (LRA) at NASA’s Goddard Space Flight Center, Greenbelt, Maryland, demonstrating the basic design: a metallic semi-hemispheric disk, with eight silica glass cubes embedded in its surface. NASA/Goddard

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.

These devices consist of a small aluminum hemisphere, 2 inches (5 centimeters) in diameter and 0.7 ounces (20 grams) in weight, inset with eight 0.5-inch-diameter (1.27-centimeter) corner cube retroreflectors made of fused silica glass. LRAs are targeted for inclusion on most of the upcoming CLPS deliveries headed to the lunar surface.

LRAs

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