A. D. Vinogradov – Dr.Sc. (Eng.), Professor, Chief Research Scientist,

Air Force Academy n.a. professor N.E. Zhukovsky and Y.A. Gagarin (Voronezh)

E-mail: mvvad@mail.ru

V. V. Gribanov – Ph.D. (Phys.-Math.), Research Scientist,

Air Force Academy n.a. professor N.E. Zhukovsky and Y.A. Gagarin (Voronezh)

E-mail: vgribanov@yandex.ru

The task of determining the coordinates of ground-based sources of radio emission based on the simultaneous azimuth and angular radio direction finding of radio emission sources and three radio landmarks from the aircraft has been considered. An analytical solution to the problem of determining the coordinates of an onboard direction-finding antenna array has been obtained from the results of measurements of azimuths and elevation angles of three landmarks from the aircraft. The relationships between the coordinates of the ground-based radio source and the azimuths and the elevation angles of the three radio landmarks and the ground-based radiation source to be traced, simultaneously measured by the onboard azimuth-angular direction finder, have been found. The derived expressions require no use of the bearing, pitch, and roll information of an onboard direction-finding antenna array to calculate ground-based radiation source coordinates.

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