Photon-Burst Correlation Techniques for Atmospheric Crosswind Measurements
Final rept. 14 Dec 1979-13 Jun 1983
COLORADO STATE UNIV FORT COLLINS DEPT OF PHYSICS
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With a cw visible laser, the method of photon-burst correlation is used to measure atmospheric crosswinds. A scaling law, including the effects of atmospheric turbulence, for performance evaluation of both laser Doppler LDV and laser time-of-flight LTV velocimeters, is introduced theoretically and established experimentally with field experiments. Crosswind measurements in the night at a range of 500 m with a low power argon-ion laser are reported. The measured signal particle arrival rate is consistent with the predicted arrival rate based on the scaling law. In addition to the use of higher laser power, it is suggested that what proper inclusion of signal photon bursts resulting from the simultaneous arrival of several particles, routine operation of this type of laser velocimeter for long ranges, up to 1000 m, should be feasible.
- Atmospheric Physics
- Lasers and Masers
- Nuclear Physics and Elementary Particle Physics