A.S. Davidenko - Post-graduate Student, St. Petersburg State Polytechnical University. E-mail: ammodo@yandex.ru
S.B. Makarov - Dr. Sc. (Eng.), Professor, Head of Institute of Physics, Nanotechnology and Telecommunications, St. Petersburg State Polytechnical University. E-mail: makarov@cee.spbstu.ru

One of ways of definition of objects spatial orientation is the method of a reference phase-s difference, which is used in correlation interferometers when determining bearing on a source of radiations. The operation algorithm of the interferometer consists in consecutive comparison of theoretical values of (reference) phase-s difference received for various angles of a wave arrival, with values of a phase-s difference, received as a result of experimental measurements. Couples of antenna elements are connected to receivers at which exits there is a measurement of an experimental phase-s difference of received waves between two antenna elements (vector base) located at some distance from each other on object. Comparison is made according to criterion of the minimum mean square deviation or correlation coefficient. The maximum coefficient of correlation corresponds to the most reliable direction on a radiation source. In the majority of practical cases, the platform with antennas (object) is in movement in relation to a source of radiation (maneuvering of unmanned aerial vehicles, change of the current values of tilt angles of the ship). At such dynamic movements of a platform it is necessary to consider Doppler frequency shift which emergence can give to an error definitions of a phase-s difference of accepted wave and, as a result, to an essential mistake in definition of object spatial position. Let the platform (for example, being on the unmanned aerial vehicle or the pilotless boat) move to the planes on a circle. Concerning the rotation center, reception antennas are at different distance, and each of them has various linear speed concerning a radiation source that leads to emergence of Doppler frequency shift, various for each of antennas. One of their parameters on which the value of Doppler frequency shift for harmonic radiation depends, the angle between a vector base and the direction on a signal source is. Because of it for various values of angles of rotation of a platform influence of effect of Doppler on the accuracy of definition of spatial orientation will differ. In by means of modeling dependences of value the mistakes average on all possible values of angles of rotation, in the presence of Doppler shift of frequency of fluctuation are received. As influence of Doppler Effect on probability of a gross blunder is shown. Except the analysis of extent of influence of Doppler Effect on the accuracy of definition of spatial orientation of dynamic objects, the methods allowing significantly to reduce this influence at the expense of use of several sources of radiation, and also application of additional algorithms are offered.