Abstract: A wind-measuring system using three separate optical systems, each consisting of a 3 mW He-Ne 1aser and two photodiode receivers, forming an equilateral triangle 300 m on a side, has successfully measured the divergence ...

Abstract: The influence of atmospheric stability on the vertical spectra of refractive index and air velocity is studied. Spectra of refractive index and air velocity are deduced from beam-swinging experiments in the area between ...

Abstract: Three acoustic sounders, with antennas having vertically-pointed beams located at the vertices of a triangle about 300 m on a side, have been used successfully to calculate horizontal phase velocities of gravity waves in ...