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利用长距离GPS动态数据处理方法,根据四川GPS网地震前后的观测数据,计算出了四川GPS网各站点地震前后的位移量。以相对稳定的雅安站为参考站,计算出了绵阳站和郫县站的动态变形序列。汶川地震动态地壳变形分析结果表明,地震期间,绵阳站和郫县站的主运动朝向西北方向,同时伴随有小幅摆动。在高程方向,绵阳站出现先上升后下降的运动特征,郫县站出现上下波动特征。
Using long-range GPS dynamic data processing method, according to the observed data before and after the GPS network in Sichuan Province, the displacement of each site in Sichuan GPS network before and after the earthquake was calculated. With relatively stable Ya’an station as a reference station, the dynamic deformation sequence of Mianyang and Yixian stations was calculated. The analysis of the dynamic crustal deformation of the Wenchuan earthquake shows that during the earthquake, the main movement of Mianyang Station and Yixian Station is toward the northwest direction accompanied by a slight swing. In the elevation direction, Mianyang station first appeared after the movement characteristics of the rise and fall, Yixian station fluctuations appear up and down characteristics.