中国地壳运动观测网络首期观测数据处理

Data procession of the first epoch measurement of the crustal movement observation network in China

介绍了中国地壳运动观测网络的布设、基准站和基本站首期观测情况。利用 GAMIT和GL OBK软件对首期观测数据进行了处理 ,计算结果归算到 ITRF97框架上。单天整体解结果表明 :基线重复性 NS向分量为 2 .2 8+0 .87× 1 0 - 9×S,EW向分量为 3.67+0 .82× 1 0 - 9×S,高程分量为 6.84+1 .2 9× 1 0 - 9×S(S为 GPS站间距离 ,以 mm为单位 )。对基准网和基本网的整体平差结果表明 :点位精度水平分量为 2～ 3mm,高程分量为 3～ 5mm。

The distribution and the first epoch measurement of the crustal movement observation network in China are described. The GPS observational clata of the fiducial network and basic network is processed with different package of GAMIT/GLOBK. The computational results are obtained with ITRF97 as reference frame. Results show that the repeatability of baseline N S component is 2.28+0.87×10 -9 ×S, the one of E W component is 3.67+0.82×10 -9 ×S, and the one of vertical component is 6.84+1.29×10 -9 ×S, where S is distance between GPS stations with unit of mm. After the integral adjustment of the fiducial network and basic network, it shows that the horizontal component of coordinate precision of stations is 2～3mm, the vertical component is 3～5mm. It can be concluded that the first epoch measurements meet the requirements of design.