摘要
为了防洪防灾及对水患区的治理,在洞庭湖区建立了高精度的GPS构造沉降监测网。顾及到对流层延迟的影响,实测了每个测站处的气象数据。基线解算采用了高精度的解算软件GAMIT,监测网平差使用了GLOBK软件。解算出的起算点的坐标精度为±3.0mm。由两期GPS观测数据所计算的各个监测点的南北方向和东西方向的中误差都小于1mm,垂直方向的精度都优于3.0mm。研究和计算结果表明,洞庭湖区的构造沉降变形是很显著的。两期GPS监测获得的每个监测点的垂直变形值显著可信,可直接用于沉降变形分析和地壳运动研究。
In order to prevent flood and get the flooded area controlled, a high precision GPS tectonic subsidence-monitoring network has been established in the Dongting Lake Area. Considering the affections of tropospheric delay, the meteorologic data at every site were surveyed really. The high precision GAMIT software is used to resolve the baselines. And the monitoring network adjustment is carried out with GLOBK software. The coordinate precision of the initiative site computed is ±3.0mm. The precisions of the north component and east component of all monitoring sites that computed by two periods GPS observation data are superior tolmm. And the precision of the vertical component of all monitoring sites was superior to 3mm. It is verified by the research and the computed result that the Dongting Lake Area has a remarkably uneven tectonic subsidence deformation. The vertical deformation value of every GPS monitoring sites that gained after two periods GPS monitoring is marked and credible. These values can be directly applied to the subsidence deformation analysis and diastrophism research.
出处
《全球定位系统》
2005年第4期23-27,共5页
Gnss World of China
基金
国土资源部科技基金资助项目(214151900)
关键词
GPS监测
构造沉降
数据处理
变形分析
GPS monitoring
tectonic subsidence
data processing
deformation analysis
