Accession Number : AD0675647

Title :   THE CORRELATION OF THE SCATTERING CROSS-SECTIONS OF THE DISTURBED INDEX OF REFRACTION AND THE ACCELERATION INCREMENT OF A CONVENTIONAL AIRCRAFT DUE TO CLEAR AIR TURBULENCE,

Corporate Author : TEXAS UNIV AUSTIN ANTENNAS AND PROPAGATION LAB

Personal Author(s) : Griffin,C. R. , Jr. ; LaGrone,A. H.

Report Date : 28 MAY 1968

Pagination or Media Count : 28

Abstract : The theoretical relationship between the effective radar backscattering cross-section for regions of atmospheric turbulence and the mechanical energy of the turbulence is developed along the lines of existing theory. The cross-section formula is developed in terms of two parameters, the mean gradient of refractive index fluctuations in turbulence, and mean squared velocity fluctuations. Next the response of a conventional aircraft, in terms of load factor, to vertical components of velocity is determined and the substitution of parameters which is effected results in an expression for turbulence scattering cross-section in terms of mean squared load factors measurable from an aircraft, and refractive index gradient, also measurable from an aircraft. A method is thus obtained for verifying the theory of homogeneous turbulence and associated scattering theory by simultaneous measurement of radar cross-section parameters from an aircraft in the turbulence and by a ground based radar set. (Author)

Descriptors :   (*CLEAR AIR TURBULENCE, RADAR CROSS SECTIONS), (*RADAR CROSS SECTIONS, BACKSCATTERING), CORRELATION TECHNIQUES, REFRACTIVE INDEX, AERODYNAMIC LOADING, AIRCRAFT EQUIPMENT, RADAR SCANNING, RADAR SIGNALS, PROPAGATION, RADIOFREQUENCY, ATMOSPHERIC MOTION, PROBABILITY, PITCH(MOTION), MOMENT OF INERTIA, EQUATIONS OF MOTION, RESPONSE

Subject Categories : Atmospheric Physics
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE