Accession Number : AD0712352

Title :   A RADIO ACOUSTIC SOUNDING SYSTEM FOR THE REMOTE MEASUREMENT OF ATMOSPHERIC PARAMETERS.

Corporate Author : STANFORD UNIV CALIF STANFORD ELECTRONICS LABS

Personal Author(s) : Marshall,James M.

Report Date : AUG 1970

Pagination or Media Count : 146

Abstract : 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)

Descriptors :   (*ATMOSPHERIC TEMPERATURE, PROBES(ELECTROMAGNETIC)), (*PROBES(ELECTROMAGNETIC), ACOUSTIC SIGNALS), DOPPLER RADAR, MATHEMATICAL MODELS, SCATTERING, REFRACTIVE INDEX, DOPPLER SYSTEMS, ELECTROMAGNETIC WAVE REFLECTIONS, TEMPERATURE INVERSION, DESIGN, SIGNAL-TO-NOISE RATIO, ACCURACY

Subject Categories : Atmospheric Physics
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE