Terms of appearance of abnormally large errors in phase direction finders in case of receiving signals from a radio source with a scanning antenna along terrestrial paths

Analytical relations, defining conditions for appearance of abnormally large errors in case of receiving signals from radio source with scanning antenna by a direction finder along terrestrial paths, are obtained. It is theoretically proved that it is necessary to compare the phase difference measurement at various bases of the direction finder with a certain threshold in order to detect bearings with abnormally large errors.