基于移动曲面法的中国大陆地壳运动速度场拟合

Velocity Field Fitting of Crustal Movement on China Mainland Based on Moving Surface Method

通过计算全国GPS一、二级网点和国家A、B级网点以及中国地壳运动观测网络点的速度场，得到中国大陆1169个台站在ITRF97框架下的实测速度，并采用移动曲面法拟合了基于实测速度的中国大陆地壳运动速度场．结果表明，内插半径在200～300km范围内较为理想，在R一250km时偏差优于6mm．

The velocity fields of the first-and second-order GPS network points,the national A-and B-or- der GPS network points and China＇s crustal movement surveying points were separately calculated,the ac- tual velocity of 1169 stations on China Mainland was obtained based on ITRF97, and the velocity field of crustal movement on China Mainland was fitted by the moving surface method. The results show that the interpolation radius in the range of 200--300 km is ideal,and the deviation is more than 6 mm when the in- terpolation radius is 250 km.