METHOD FOR UNAMBIGUOUS DETECTION OF OVERALL PHASE DIFFERENCE USING INTERFERENCE MEASUREMENTS FOR DETECTION OF CHARACTERISTICS OF ANGULAR ORIENTATION OF OBJECTS USING SIGNALS OF SATELLITE RADIO NAVIGATION SYSTEM

摘要

FIELD: radio navigation, in particular, medium-altitude satellite radio navigation global positioning systems. SUBSTANCE: method involves receiving of signals from visible satellites with known position with respect to object by means of two antennas of interferometer, measuring for each satellite an interference phase difference &;1, where i is satellite number, i=1,2,..., m; storing this phase difference, using measured phase differences &;1 for M>m satellites in order to generate all combinations of overall phase differences &;1= n1+&;1, where n is integer values of phase cycles in range of -l/lambda to +l/lambda,, where l is interferometer base length , lambda is satellite system signal wavelength. Then method involves selection of combinations which match phase interference measurements for remaining (m-M) satellites, generation of all combinations of overall phase differences Vijk using signals from M= 3 satellites which numbers i, j, k conform to condition of maximal size of parallelepiped Vijk of unit vectors rl,rj,rk for these satellites. Selection involves preliminary generation of combinations φl,φj,φk, which conform to condition , where Qij, Qjk, Qki are scalar products of corresponding unit vectors of satellites, T1 is threshold value which is proportional to variance of phase measurements (in case of relative position detection, when precise base length is unknown, T1 is increased by value which is proportional to variance of base length). Then measured phase samples &;t,, where t are numbers of remaining satellites are used for generation of combination of overall phase differences φl,φj,φk,φt...m, for all t which conform to condition , where is absolute value of difference between value given by equation nt