中文摘要：

介绍了采用不同GPS分析中心的SINEX解进行数据组合的处理方法，并采用附加系统误差参数的函数模型对数据组合中的系统误差进行了平差处理。从结果可以看出，估计了Helmert转换参数的测站坐标精度比没有估计Helmert转换参数的测站坐标精度要高，说明本文方法能有效地消除系统误差的影响，并估计了系统误差的大小。

英文摘要：

The method to combine the GPS data from different analysis centers by SINEX files is introduced. In order to analyze the systematic error, the Helmert transformation parameters are added into the adjusment model in the data processing. The results show that the accurcy of coordinates with Helmert transformation parameters is higher than that of the coordinates without Helmert transformation parameter so as to indicate that the method can elimilate the systematic errors effectively and the systematic errors can also be estimated.