GPS接收机天线装置定向标志线及平均相位中心参数的检测

本文讨论了GPS测量的重要误差来源之一——接收机天线相位中心漂移误差,研究了表征平均相位中心的基本参数及其检测和处理方法。如果用户设备进行了这种检测,并对观测成果作了相应的修正,目前大部分商品接收机在几十公里以内的短过测量中,精度可以提高到3 mm+2 ppm·d(d为边长,单位:km),同时解决了混合机组参加GPS网观测和处理的难题。

Calibration for Setting the Orientation Mark on a GPS Receiver/Antenna and for Determining the Parameters of the Average Phase Center

&This paper deals with an important error source for GPS positioning caused by thephase center offset of each receiver/antenna involved. Furthermore, it is also investigatedto find out the calibration method and processing procedures, which provide the basicparameters for the average phase center. If the calibration could be made before putting the receiver/antenna sets into asurveying campaign, and also the calibration results are employed into the field observa-tion and data processing, it is obvious that more accurate positioning results can beobtained, say better than (3mm + k~*d), where d is the distance of the baseline in km.,and k is the scale factor in ppm. depended on the mathematical model and the ephemeristype used in the processing. On the other hand, the problem which involves the use of multiple type of GPSreceiver/antenna sets in a common observation session and computational run has beensolved.