WS: SPACE

Created: 11/3/1969

OCR scan of the original document, errors are possible

WEEKLY

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Soviet Moon Probe to Carry French Laser Experiment: rench Inzer reflector is tc be placid on the noonoviet Luna probe The apparatus consists of li* silica-glass triangular prismatic reflectors shapedas to give total reflection of incident light. The reflector apparatus was constructed in France under the direction ofCentre National d'Etudes Spat.taleo. The ground installation is at Pic du Midi Observatory and consistselescope in which the emitterW ruby laserhas been fitted. The same tele-it reflected light pulses.

Comment: Bethhich crashad into th? moon at the tine of the Apollo mission, and the Soviet Lunar prob* which apparently failed onctober are thought to have carried French laser reflector packages. Ths megawatt power of the laser is not unusual. The French use ofeflectors compareseflectorsin the successful US lunar laser experiment. Ihe size of tha individual French reflectors is not given. Pic du Midi might be able to use the US reflectorson the moon, but they would have trouble locating it with their laser bean as did the US. The Soviet and French scientists also wish to conduct the complete experimentatter of national scientific preatige. Principal objective is toeries of extremely accurate measurements of the distance from the earth

to the moon.

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