Direction-finding method solution phase ambiguity in determining the spatial orientation of space vehicle

9th International Multidisciplinary Scientific and Research Conference "Modern Issues in Science and Technology" Workshop "Advanced Technologies in Aerospace, Mechanical and Automation Engineering"

自然科学;工业技术

Kartsan, I.N.^1 ; Petrosyan, M.O.^1 ; Efremova, S.V.^1 ; Khrapunova, V.V.^1

Reshetnev Siberian State University of Science and Technology, Krasnoyarsky Rabochy Av. 31, Krasnoyarsk

660037, Russia^1

关键词: Direction finding;    Interferometric methods;    Measured signals;    Phase ambiguity;    Phase difference;    Resolving phase ambiguity;    Solution phase;    Spatial orientations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/450/2/022006/pdf
DOI  :  10.1088/1757-899X/450/2/022006

来源: IOP

【 摘 要 】

When creating multichannel GNSS receivers that implement interferometric methods for measuring spatial orientation using GLONASS and GPS signals, the main problem is the resolution of phase ambiguity when measuring the phase difference for spatially separated antennas. In order to improve the accuracy of determining the spatial orientation, interferometers with the distance between the antennas (base length) reaching several meters are used. The ambiguity in measuring the phase shift is due to the fact that the wavelength of the measured signals is sufficiently small (about 19 cm), which is much smaller than the length of the bases of the interferometer. The methods for resolving phase ambiguity can be divided into two classes: one-stage ones that operate on the basis of the results of each measurement and methods based on filtering that require measurement of phase shifts over a certain time interval.