Abstract
The use of a FM CW radar for the measurement of atmospheric sound velocity profiles is investigated. In contrast to particulate scatterers or clear air turbulence the sound waves represent a coherent scattering structure, and the consequences are examined. We derive the theoretical shape of the signal spectrum and present examples of velocity profiles of vertically propagating sound waves. As the sound and clear air echoes are separable by frequency, simultaneous measurements of atmospheric wind and temperature profiles should be feasible. Because of the excellent spatial and temporal resolution of the FM CW technique, these measurements perhaps offer a possibility of future remote heat flux measurements.
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