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《Journal of Geodesy and Geodynamics》 2008-03
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STUDY ON GAUSSIAN SMOOTHING OF GRACE TEMPORAL GRAVITY VARIATION

Zhou Xin1,2),Xing Lelin1,2,3),Zou Zhengbo1,2) and Li Hui1,2)1)Institue of Seismology,CEA,Wuhan 4300712)Crustal Movement Laboratory,Wuhan 4300713)School of Geodesy and Geomatics of Wuhan University,Wuhan 430079  
Two methods isotropic Gaussian filter and non-isotropic Gaussian filter of GRACE temporal gravity variation smoothing,and their properties are studied.With these methods,the global geoid change between January and February 2006 was computed.The results show that non-isotropic Gaussian filter's spectrum depends not only on degree but also on order;the non-isotropic smoother yields enhanced GRACE signals with significantly higher spatial resolution in latitude and the same resolution in longitude without reducing the accuracy as compared to isotropic Gaussian filter.
【Fund】: 国家自然科学基金(40704009)
【CateGory Index】: P312.1
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