天线相位中心变化及对基线解的影响

Antenna Phase Center Variations and Its Influence on Baseline Solution

阐述了天线相位中心改正的数学模型和天线相位中心变化的数字模型,对实测的GPS控制网进行了数据处理,通过加上/不加天线相位中心变化的改正来考察对基线解算结果的影响。试验表明,卫星天线相位中心变化对长基线有影响,对短基线没有影响。接收机天线相位中心变化对基线解的影响与基线两端接收机天线型号是否相同有关:型号相同时没有影响;型号不同时有影响,影响量大约为0.02 ppm。

The mathematical models of the antenna phase center corrections and numerical models of the antenna phase center variations were described. The collected data in a GPS control network were processed to examine whether the antenna phase center variations would affect the results of the baseline with/without the antenna phase center variations corrections. The tests showed that the satellite antenna phase center variations had influence on the solutions of long baseline, had no influence on the solutions of short baseline, but the influence of receiver antenna phase center varia- tions on the solutions of baseline have relation with the receiver types occupied at the both ends of the baseline, if the types of two receivers antennas are the same, receiver antenna phase center variations have not any influence on base- line solution, if the types of the two receivers antenna are different, receiver antenna phase center variations have in- fluence on baseline solution, and the causing correction is about 0.02 ppm.