Physics
Scientific paper
May 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977rspta.284..457r&link_type=abstract
Philosophical Transactions for the Royal Society of London. Series A, Mathematical and Physical Sciences, Volume 284, Issue 1326
Physics
1
Scientific paper
Most laser ranging systems operating today are first-generation systems using either cavity dumped or Q-switched ruby lasers and time-interval counters and are capable of an accuracy of 10-100 cm. Second-generation systems using mode-locked Nd: YAG lasers and epoch timers are being developed and compact, largely automated, fully mobile stations can now be built which are capable of ranging to both high satellites and the Moon with an accuracy of a few centimetres. Even higher accuracy is possible by using streak tubes as detectors and using measurements at two wavelengths to compensate for variation in atmospheric transmission. The use of CO2 lasers and heterodyne detection, which has the advantage that both range and velocity can be measured, is also discussed.
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