First Results of Field Absolute Calibration of the GPS Receiver Antenna at Wuhan University.GNSS receiver antenna phase center variations (PCVs), which arise from the non-spherical phase response of GNSS signals have to be well corrected for high-precision GNSS applications.  The Chinese large-scale research project "Crustal Movement Observation Network of China" (CMONOC), which requires high-precision positions in a comprehensive GPS observational network motived establishment of a set of absolute field calibrations of the GPS receiver antenna located at Wuhan University. 
GPS
First Results of Field Absolute Calibration of the GPS Receiver Antenna at Wuhan University.GNSS receiver antenna phase center variations (PCVs), which arise from the non-spherical phase response of GNSS signals have to be well corrected for high-precision GNSS applications.  The validation of estimated PCV values of test antenna are finally conducted, compared with the International GNSS Service (IGS) type values. 
GNSS