Accession Number : AD0775533

Title :   Fluctuation Spectrum and Velocity Structure Function.

Descriptive Note : Technical rept.,

Corporate Author : CHICAGO UNIV ILL LAB FOR ATMOSPHERIC PROBING

Personal Author(s) : Sychra,Jaroslav

Report Date : 01 JAN 1974

Pagination or Media Count : 28

Abstract : An equation relating the fluctuation spectrum to the distribution of radial velocity differences of the scatterers, and the pulse volume illumination function is derived. Assuming that the radial velocity differences are due only to turbulence, the particles follow the air motions faithfully, the turbulence is homogeneous, and the reflectivity is constant, then it is shown that the variance of the fluctuation spectrum is a weighted average of the turbulence structure function, the weighting function being completely determined by the pulse volume Illumination function. Various methods of estimating the structure function from measurements of the fluctuation spectrum variance are discussed. (Author)

Descriptors :   *Radar signals, *Atmospheric disturbances, *Electromagnetic scattering, Functions(Mathematics), Variations, Meteorological radar

Subject Categories : Meteorology
      Active & Passive Radar Detection & Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE