Measurement And Algorithm Of Phase Center Center Deviation Of GNSS Receiver Antenna

With the rapid development of global navigation and positioning system,the application of the field is also more and more widely,the user of the global navigation and positioning system navigation and measurement accuracy also put forward higher requirements.The deviation of the phase center of the GNSS receiver antenna and the change of the phase center have some influence on the high precision navigation and positioning,so it must be considered in the high precision navigation and measurement applications.The phase deviation of the GNSS receiver antenna phase is due to the inconsistency between the electrical center of the receiver antenna and the geometric center,different types of receivers,different types of receiver antennas,and receiving different types of frequency signals at the receiver antenna phase center The deviation of the receiver antenna phase will change with the height angle and azimuth angle of the satellite,and can not be cleared by means of difference,so it needs to be corrected by establishing the correction model.In this paper,we summarize the causes of the phase deviation and the variation of the phase of the GNSS receiver antenna and the theoretical methods for the determination of the phase center deviation and variation of the GNSS receiver antenna by domestic and foreign scholars.On the basis of this,the deviation of the phase center of the GNSS receiver antenna in the horizontal direction was measured by the rotation observation method,and the deviation of the phase center of the GNSS receiver antenna in the vertical direction was measured by the exchange antenna method.Method only two GNSS receivers,the experimental operation is simple,and the accuracy of the determination of the assessment.The method of determining the phase center of the GNSS receiver antenna is based on the center deviation of the receiver antenna.The method of measuring the phase center of the GNSS receiver antenna is the method of microwave darkroom method,automatic robot method and relative antenna phase observation.In this paper,a set of receiver antenna phase center change measurement model is established by using the method and theory of relative antenna phase observation.The change of the phase center of GNSS receiver antenna is measured by field observation data,and the measured result is compared with the reference standard value The results show that it is feasible to establish the measurement model,and use this measurement model to determine the change of the phase center of the receiver antenna of the Beidou satellite navigation system,which has certain reference value for improving the accuracy of the satellite navigation and positioning.