不同ITRF参考框架NEU坐标系统下的速度场转换

TRANSFORMATION OF VELOCITY FIELD WITHIN NEU COORDINATE SYSTEM BETWEEN VARIOUS ITRFS

利用GLOBK输出的NEU坐标系与空间直角坐标系、大地坐标系之间的几何关系,顾及不同ITRF参考框架下三维速度值之间的转换参数,推导了不同ITRF参考框架下地壳水平运动速度之间的直接转换公式,过程清晰明了,易于编程实现。结果表明,ITRF2005与ITRF2008下水平运动速度场存在明显的系统偏差。

Using the geometric relationship among NEU coordinate system obtained with the GLOBK software, Cartesian coordinate system （XYZ） and ellipsoidal coordinate system （BLH）, taking into account the three-dimen- sional velocity transformation parameters between various ITRFs, a direct conversion formula of crustal horizontal velocity with various ITRFs is derived. This transformation process is clear and easy to be programmed. The result demonstrates that there exists a significant systematic bias in the horizontal movement velocity field within the ITRF2005 and ITRF2008.