A Study on Calibrating the GPS Antenna Phase Center in Short Baseline Field
|關鍵字:||全球定位系統;相位中心;短基線;GPS;Phase Center;Short Baseline|
In recent years, GPS technology has become available for everyone. With the addition of computer software, there has been remarkable progress with each passing day. As the study of correction models for GPS accuracy develops, the corresponding study of GPS antenna phase center models is also moving forward. In the practice of the differential GPS principle, the precise point is being measured from GPS is in proportion to GPS antenna phase center. However, the phase center of a GPS antenna is not a stable point. Therefore it affects GPS relative differential GPS positioning in vertical and horizontal. With more and more improvements in research on GPS antennas and even develop to the zero-phase center offset antenna. However it is still a question in daily GPS practice. It is therefore essential to prove the effect of zero-phase center offset antenna in the future. This thesis will discuss the antenna phase center offsets from GPS data by using unsophisticated geometry relationships of GPS antenna phase center, computing the deviation and adjusting it by the ‘Least Square Method’ in the short baseline field. It will also command a reasonable model to calibrate antenna phase center.