摘要
2000国家大地坐标系（CGCS2000）不具备速度场信息,不能完整表述中国地心坐标参考框架的动态性和现势性,因此,有必要基于CGCS2000建立中国大陆速度场模型。介绍了基于CGCS2000中国大陆速度场获取的方法;利用2000-2010年国家GPS连续运行站及国际IGS站的大量重复观测数据,获得了高精度GPS连续运行站点位成果及速度场成果,发现点位水平方向的精度优于±2mm,垂直方向的精度优于±3mm;速度场南北方向精度优于每年±1.6mm,东西方向精度优于每年±1.8mm;研究了11年来国家GPS连续运行站的变化趋势及变化量,获得了各个站点的运动趋势,并与中国地壳运动观测网络重合点进行分析比较,发现其差异较小,证明了计算结果的可靠性和可行性,说明CGCS2000为速度场模型的建立可提供高精度数据。
China Geodetic Coordinate System 2000（CGCS2000）has no velocity,and can not show the dynamic and verisimilitude of China geocentric coordinate reference frame in whole.Therefore,it is necessary to build the velocity field model based on CGCS2000.The acquisition method of velocity field in China continent based on CGCS2000 was introduced;a large number of duplicate observed data at China GPS continuous operation stations in the international IGS stations from 2000 to 2010were used to obtain the point results of high-precision GPS continuous operation stations and velocity field.It is found that the horizontal precision of point is better than±2mm,and the vertical precision of point are better than±3mm;the precision of velocity field in the north-south direction is better than ±1.6mm per year,and that in the east-west direction is better than ±1.8mm per year.The variation and trend of China GPS continuous operation stations in 11 years were studied,and the motion trend of each station was obtained.The coincident points from CGCS2000 and China Crustal Movement Observation Network were compared.The small difference proves that the calculating result is reliable and feasible,and CGCS2000 can provide high-precision data for building velocity field model.
出处
《地球科学与环境学报》
CAS
2014年第3期136-142,共7页
Journal of Earth Sciences and Environment
基金
国家高技术研究发展计划("八六三"计划)项目(2009AA121402-5)
