Accession Number : AD0287230

Title :   AN APPROACH TO AZIMUTH ANGLE REFRACTION CORRECTIONS

Corporate Author : NEW MEXICO UNIV ALBUQUERQUE ENGINEERING EXPERIMENT STATION

Personal Author(s) : CRAMOND,WALLIS R. ; THORN,DONALD C.

Report Date : APR 1962

Pagination or Media Count : 1

Abstract : Analyses of tropospheric refraction of electromagnetic waves propagaing in the atmosphere have been based on a spherically symmetric medium. However, this applies only to ray bending in a vertical plane (elevation angles). Numerous methods have been developed to correct for elevation angle errors. In February 1961, the presentation of a new method for use in a nonsymmetricATMOSPHERE REVIVED INTEREST IN HORIZONTAL (azimuth angle) bending. In order to use this method to test the significance of azimuth angle errors, the sptial distribution of index of refraction must be known. A model which utilizes meteorological profiles to describe the lower troposphere is proposed. Since meteorological data are necessarily limited, plane surfaces are selected as the basic component of the model. The different combinations of planes are discussed and a model using parallel planes tilted with respect to a plane tangent to the earth becomes the fundamental part of a representation to be used with the nonsymmetric bening correction technique. (Author)

Descriptors :   *ATMOSPHERIC REFRACTION, *ELECTROMAGNETIC WAVE REFLECTIONS, *ERRORS, *RADAR SIGNALS, *RADAR TRACKING, AZIMUTH, METEOROLOGY

Distribution Statement : APPROVED FOR PUBLIC RELEASE