GPS Antenna is a significant part of The consumer facility: GPS receiver will get satellite signals and related data via an antenna; the baseline and three-dimensional vector GPS obtained which used for geodetic measurements, is the consequence of the coordinate vector between the centers of GPS antenna, in addition to the antenna height, then after corresponding correction. For the GPS antenna’s features there is inconsistent between the phase centre and center. Not just in three directions of the northwest, altitude being a bias, also changes with GPS satellite receiver’s altitude and azimuth. This shift will bring in the elevation direction of in a dozen centimeters of error, if exit to be amended, will affect the measurement outcome in the GPS measurements.

When using GPS for static measurements, conducts short baseline or ultra short baseline static dimensions with the identical sort of antenna, the GPS antenna at both ends of the baseline can get the identical amount of satellites and signal power. GPS antenna singapore at the ends of baseline’s phase centre has the changes with GPS satellite receives. This situation can be thought of as a change in the antenna phase center. However, the corresponding components and the length are unaffected. So in the baseline there’s not any need to consider corrections.

But measurement with the same Type of antenna, the GPS antenna at both ends of the baseline receives Satellite, not merely the elevation angle, azimuth angle might be Different, but the satellites’ amount might be different. In this case, Corrections with changes from the antenna phase centre has to be considered when calculating baseline.