APPLICATION OF STOKES KERNELS IN REGIONAL GEOID DETERMINATION
1)School of Geodesy and Geomatics, Wuhan University, Wuhan 430079
2)Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University,Wuhan430079
Abstract：The accuracy of different kernels are compared with each other by using the gravity data along the offshore of American sea in DNSC08GRA model. As the results show, in our test region, the modified Stokes kernels can improve the accuracy by 3.4 cm compared with the spherical Stokes kernel, while the difference between different modified kernels is tiny. When verifying the results with GPS/leveling data, it demonstrates the existence of a 1.17 m systematic variation between the geoid fitting before and after. Besides, all the computing accuracy can improved by 7 cm after fitting.
