Estimation of errors caused by spherical approximation of earth shape in radio emitters position fixing process using direction finding

摘要

Accuracy improving of radio emitter position fixing is sufficient in the field of radiomonitoring, communication intelligence, radionavigation and radiogeodesy. This paper represents results of errors estimation in radio emitter position fixing process applying spherical approximation of the Earth surface obtained by means of numerical simulation. Study of values of these errors was paid little attention in scientific literature. Besides that there are no indications as for development and implementation of algorithms accounting for Earth spheroid shape. In presented article it is shown that for improving accuracy of position fixing on spreading radio paths it is necessary to take into consideration Earth surface shape. Realization of position fixing algorithms accounting earth spheroid shape revealed their high efficiency in real RDF networks. Software realizing these algorithms is implemented in several production prototypes of RDF networks.