中文摘要：

利用2013-01地磁扰日及静日期间全球不同纬度的18个IGS站的GPS双频数据,联合伪距与相位观测数据,探讨估算单站接收机硬件延迟的有效方法,估算的结果与IGS公布的结果差值基本在1.5ns以内,月平均值基本在1.0ns以内。

英文摘要：

Differential code biases（DCB）are major source of errors in computing the total electron content（TEC）of the ionosphere from GPS measurements.Although instrumental satellite bias values are available from various International GPS Service（IGS）analysis centers,receiver biases are provided only for very few GPS stations.Some other methods are needed to solve receiver DCB values for plenty of other GPS stations.In this study,on the basis of the GPS code and phase observations in Jan.2013 at IGS stations distributed in different latitudes,some effective methods are developed to estimate receiver DCB values for a single GPS station.It is shown that the differences between receiver DCB values estimated and those released by IGS are almost less than 1.5ns,and monthly averages of the differences are below 1.0ns for most receiver stations.