中文摘要：

评价详细基于 GPS 答案的 IGS SINEXfile 被讨论的地球自转参数(ERP ) 的方法。有估计 ERP 的二个不同方法：一个人是参数转变方法，并且其它是有限制条件的直接调整方法。由把估计的结果与独立版权节目作比较到 IERS 结果，全身的错误能与 GPS 观察在估计的 ERP 被发现的剩余。

英文摘要：

The methods of Earth rotation parameter （ERP） estimation based on IGS SINEX file of GPS so- lution are discussed in detail. There are two different ways to estimate ERP： one is the parameter transformation method, and the other is direct adjustment method with restrictive conditions. By comparing the estimated results with independent copyright program to IERS results, the residual systemic error can be found in estimated ERP with GPS observations.