Automatic determination of the vertical phase center offset for gnss receiver

To solve the problems of low efficiency and high cost in detecting the vertical deviation of the phase center of GNSS receiver antennas, a measurement method utilizing a two-dimensional turntable is proposed. By analyzing the baseline repeatability under different observation durations, the optimal observation period is determined and statistically validated using an F-test. The two-dimensional turntable is automatically controlled to position the GNSS receiver and antenna for static observations at various azimuth and elevation angles. The vertical phase center offset of the GNSS antenna is derived through baseline processing, coordinate fitting, and geometric analysis. The repeatability of the vertical offset measurements is 0.6 mm, and the deviation from the NGS reference value is less than 1 mm, demonstrating high measurement accuracy and improved detection efficiency of the proposed method.