曲网格克里金网格化方法及其在重力测量近区地形改正中的应用

Curved-grid kriging gridding method and its application to near-station terrain correction in gravity measurement

文中将研究一种高精度、强稳定性与灵活性的近区地改值计算方法。首先将克里金网格化技术与曲网格方法相结合,研究曲网格克里金网格化方法(简写为CGKG-M)及其扩边技术,进而实现数据的圆域网格化;再将该方法应用于圆域近区地改值的计算中,实现任意方位、任意环数的圆域近区地改值计算;最后进行了模型与实际地形的测试和误差分析。研究结果表明,CGKG-M近区地改算法具有方法简单、计算精度高、灵活性与稳定性强、计算速度快等特点,是与GTCS-1型近区地改仪数据采集格式相匹配的一种高效、快捷的近区地改值计算方法。

In this paper,a high?accuracy and strong stability near?zone terrain correction method is discussed.Firstly,combining Krig?ing gridding method with curved?grid computation technology,a Curved?Grid Kriging Gridding Method( short for CGKG?M) and its ex?tending edge techniques are implemented to realize data?gridding in circle area;Next, this method is used to compute near?zone terrain correction value and realize the gravity measurement near?zone terrain correction value's computation which contains any angles and circles.Finally,some modeling tests,real data computation and error analysis of this method are carried out.The research result has shown that CGKG?M near?zone terrain correction value computation method has some characteristics,such as high computa?tion accuracy,strong stability and flexibility.It is a simple,efficient and fast method for near?zone terrain correction value computation which matches the measurement data form of GTCS?1 gravity measurement near?station correction instrument.