中文摘要：

根据高精度卫星导航定位的实际需要，介绍了利用中国GPS区域网双频相位平滑伪距实测数据，准实时监测区域网电离层电子总含量（TEC）变化和GPS卫星硬件延迟（DCB）的方法和结果．着重研究了区域网独立测定DCB的可靠性，利用中国境内的GPS站点分别构造了3个大小不同的区域网，通过实测DCB和垂直电子总含量（VTEC）与CODE（Center for Orbit Determinationin Europe）结果的比对表明：为了获得区域网准实时测定DCB的可靠结果，对区域网的大小有一定的要求；利用中国GPS区域网，准实时测定的VTEC和DCB的比较精度可达2．0TECu和0．25ns．

英文摘要：

According to the requirement of high-precision satellite navigation, the method and result of quasi-real-time monitoring the variation of the regional ionospheric TEC （total electron content） and GPS satellite differential code bias （DCB） are introduced. The pseudorange data smoothed by dual-frequency carrier phase are used from the GPS networks in China. Especially, the feasibility of retrieving DCB independently from the regional GPS networks with different sizes is studied. Three networks based on the GPS stations in China are constructed. The comparison of the computed DCB and VTEC （vertical total electron content） with those of CODE （Center for Orbit Determination in Europe） shows that it is necessary to consider the size of regional network in order to obtain the reliable result of local quasi-real-time measured DCB; the compared precisions of the regional quasi-real-time measured VTEC and DCB are about 2.0 TECu and 0.25 ns, respectively.