北京天津地区垂直形变剖面复测结果的GPS检验

利用北京和天津地区的28个GPS连续观测站资料（资料截至2008年8月）计算得到的垂直向时序结果，分析各个GPS连续观测站垂向分量的变化特征，计算得到2007～2008年北京天津地区GPS站垂直运动速率，并与水准测量计算得到的2007～2008首都圈地区垂直形变速率进行比较；通过寻找水准测量路线附近的GPS站点，相应于水准的初测和复测时段，计算得到GPS路线剖面图，将GPS与水准2个时段的剖面结果进行对比分析。通过水准和GPS结果的这种“由面到线”的综合比较分析，得出初步的结论：从趋势上看，GPS与水准的结果是相似的，GPS结果同样反映了2008年北京东南附近区域有隆升的迹象，但量值比水准结果小，水准结果所反映的“南升北降”的特征在GPS结果中得到一定程度的验证和体现。

Deformation Section in Tianjin and Beijing Area

With the vertical time sequence results computed by the monitoring data（until Aug, 2008） from 28 GPS stations of continuous observation in Tianjin and Beijing Area, the paper analyzes the variation characteristics of vertical component of each GPS continuous stations, calculates the vertical movement velocity of GPS sta- tions in Tianjin and Beijing Area of 2007--2008, compares with the vertical deformation velocity calculated by leveling of 2007-2008 in Capital Circle Area; Furthermore, searches GPS stations nearby the leveling route, corresponding to the first and second leveling time period, calculates the section plane of GPS route, analyzes and compares the section results of GPS and leveling of 2 time periods. Through this kind of ＂from surface to line＂ synthesis comparison between leveling and GPS results, acquires primary conclusion： GPS and leveling resuits is similar from the elementary trend, GPS results also reflect that there exists rise evidence in the neighborhood of southeast of Beijing in 2008, but the value is smaller than leveling results, the characteristic of ＂rise in south and subsidence in north＂ reflected by leveling results is also validated to a certain extent in GPS results.