TRACK高频GPS定位中震时参考站的选取方法

摘要

对于以TRACK软件为代表的差分定位软件来说,震时参考站的选择是高频GPS数据处理中的关键问题.以汶川地震为例,通过对比分析,认为选择观测质量较高,多路径效应小于0.2 m,且间距大于地震波传播速率与持续时问乘积的站点作为参考站,可获得高精度的定位结果.并通过与两种非差软件GIPSY和PANDA的对比,验证了方法的可靠性.%The reference station selecting during the earthquake is very important for the differential positioning software like TRACK in GAMIT/GLOBK. Some comparisons and analysis about Wenchuan earthquake are done, then we conclude that the for reference station select is most important. In the selection,the observations should be of high quality, the multipath effect should be less than 0.2 m and the distance between rover station and reference station should be more than the product of the velocity of seismic wave propagation multiple by the lasing time. Compared with two un-differenced software GIPSY and PANDA, the results with this method are reliable.