Abstract: While ground station is tracking satellite,antenna polarization vector that was defined at the coordinate of the satellite had shifted,and orientation of polarization vector was different as station geography diverse.The polarization vector offset is correlative with the station geography position and the satellite spotting.In order to realize the polarization vector matched for tracking satellite,we should ensure polarization vector obliquity direction.The vectors of antenna polarization adopting a coordinate transformation methods is analyzed in order to seek out a relative connection about the polarization vector obliquity between the satellite coordinate and the ground station coordinate,and to obtain the data graph of the polarization vector obliquity,which would serve to the ground station tracking satellite.

Key words: Satellite antenna, Polarization vector obliquity direction, Tracking station Coordinate transformation