NASA NTRS · 19730000122
LEAPS (Laser electro-optical alignment pole for surveying)
Abstract
Azimuthal bearing between two obscured points is measured by placing laser beam at one of the points. Beam is directed straight up into the air so that some part of it may be detected from any position a reasonable distance away.
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Caudill, L.. 1973-05-01. LEAPS (Laser electro-optical alignment pole for surveying). https://ntrs.nasa.gov/citations/19730000122
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