Accession Number : AD0286298

Title :   RESEARCH STUDIES RELATED TO MAPPING, GEODESY AND POSITION DETERMINATION

Corporate Author : MIDWEST RESEARCH INST KANSAS CITY MO

Personal Author(s) : BROWN,R.S. ; GRAVITT,J.C. ; RHODES,B.L.

Report Date : 18 SEP 1961

Pagination or Media Count : 1

Abstract : The solution of the wave equation describing electromagnetic wave propagation in the troposphere is considered for a one-dimensional medium having sinusoidal permittivity variations. The wave e uation, whic has a form similar to Mathieu's equation, is solved using Floquet's theorem. An experiment is described for determining the feasibility of more effective utilization of end-point refractive index parameters in geodetic distance measurements and correction procedures. The experiment utilizes standard equipment for measuring end-point humidity, temperature, and pressure, but utilizes two standard instruments to measure the distance. The experiment would be conducted under a variety of weather conditions. Methods are presented for analyzing the data for procedures to improve distance meas rements. An experiment is described for determining the effect of homogeneous and nonhomogeneous turbulence on the angular deviation and velocity fluctuations of a light beam. Although the experiment is directed at improving the knowledge of tropospheric wave propagation in geodetic measurements, it is designed for laboratory testing where turbulence can be controlled. Both the method of producing and measuring the turbulence and the method of measuring the effect of turbulence on a light beam are described. (Author)

Descriptors :   *GEODESICS, *MAPPING, CORRECTIONS, DETERMINANTS(MATHEMATICS), ELECTROMAGNETIC RADIATION, PROPAGATION, REFRACTIVE INDEX

Distribution Statement : APPROVED FOR PUBLIC RELEASE