Research and implementation of GNSS receiver antenna phase center outdoor absolute calibration algorithm

Antenna phase center model is one of the most important error correction models for high-precision satellite navigation and positioning. This paper uses a high precision mechanical arm to realize an outdoor absolute antenna phase center calibration algorithm based on three-difference observations, and successfully calibrate a multi-frequency navigation signal antenna phase model including Global Navigation Satellite System (GNSS), with a calibration accuracy of the model better than 1mm.