Laser Ranging Retroflector

The Laser Ranging Retroreflector (LRRR) is the first ever deployable lunar laser ranging experiment. It was carried on Apollo 11 as part of the Early Apollo Scientific Experiments Package, and on Apollo 14 and Apollo 15 as part of the Apollo Lunar Surface Experiments Package (ALSEP). The LRRR consists of a series of corner reflectors set within a panel. Laser beams sent from Earth are bounced off the retroreflector and the timing of the return signal can be used to measure the distance from the signal source to the reflector. The reflector was conceived by James E. Faller in 1961. The experiment's principal investigator was initially Carroll Alley of the University of Maryland who was eventually succeeded by Faller.

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Wikimedia, Wikidata
LR cubed; LRRR; Laser Ranging Retro-Reflector; Lunar Ranging Retro-Reflector; Lunar Ranging Retroreflector; S-078; S078
space instrument, retroreflector, Arthur D. Little, PerkinElmer, 
Ashkenaz, Calvinist Republic of Ghent, Chinland, Democratic Republic of the Congo, Havilah, Kingdom of Martabam-hongsawatoi, Kingdom of Wolaita, Persia, Sikh Confederacy, Sweden, Tarshish, Dong Fang Hong 2, Ekran, 

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Location: KML, Cluster Map, Maps,

Frameless

ALSEP AS15-85-11468

ALSEP AS14-67-9386 (cropped)

AS11-40-5949 (21660108915) (cropped)

ALSEP AS14-67-9386 (cropped)

Apollo 11 Lunar Laser Ranging Experiment

NASA AS14-67-9386 (cropped)

ALSEP AS14-67-9386

Laser Ranging Retro-Reflector, Apollo (NASM-SI-2009-4788)

Replika Laserreflektor Apollo 11 Science Museum

AS14-67-9387 (21471632280)

Type	Subtype	Date	Description	Notes	Source
commons	image		ALSEP AS15-85-11468		Commons
commons	image		ALSEP AS14-67-9386 (cropped)		Commons
commons	image		AS11-40-5949 (21660108915) (cropped)		Commons
commons	image		ALSEP AS14-67-9386 (cropped)		Commons
commons	image		Apollo 11 Lunar Laser Ranging Experiment		Commons
commons	image		NASA AS14-67-9386 (cropped)		Commons
commons	image		ALSEP AS14-67-9386		Commons
commons	image		Laser Ranging Retro-Reflector, Apollo (NASM-SI-2009-4788)		Commons
commons	image		Replika Laserreflektor Apollo 11 Science Museum		Commons
commons	image		AS14-67-9387 (21471632280)		Commons