A Radio Acoustic Sounding System for the Remote Measurement of Atmospheric Parameters

摘要

A technique for the remote measurement of wind velocity, turbulence, and air temperature is presented. Regions of the atmosphere are remotely sensed using velocity information obtained via coherent scattering of electromagetic energy from an acoustic wave traveling through the atmosphere. The fundamental scattering relations are derived for a non-turbulent atmosphere. Scattering relations for the effect of wind and temperature gradients on system performance are also derived. The basic considerations involved in the design of a RASS terminal are discussed. An experiment performed to verify the scattering relations derived and to determine the limitations imposed by a turbulent atmosphere is described. Unable signal-to-noise ratios were obtained reliably to scattering heights of 1.5 km. (Author)