STUDY ON GAUSSIAN SMOOTHING OF GRACE TEMPORAL GRAVITY VARIATION
Zhou Xin 1,2) ; Xing Lelin 1,2,3) ;Zou Zhengbo 1,2) ; and Li Hui 1,2)
1)Institue of Seismology，CEA，Wuhan 4300712)Crustal Movement Laboratory，Wuhan 4300713)School of Geodesy and Geomatics of Wuhan University, Wuhan 430079
Abstract Two methods isotropic Gaussian filter and nonisotropic 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 nonisotropic Gaussian filter’s spectrum depends not only on degree but also on order; the nonisotropic 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.
Key words ：
GRACE temporal gravity
Gaussian smoothing
non-isotropic
spectrum
geoid
Received: 01 January 1900
Corresponding Authors:
Zhou Xin
Cite this article:
Zhou Xin,Xing Lelin,Zou Zhengbo et al. STUDY ON GAUSSIAN SMOOTHING OF GRACE TEMPORAL GRAVITY VARIATION[J]. , 2008, 28(3): 41-45.
Zhou Xin,Xing Lelin,Zou Zhengbo et al. STUDY ON GAUSSIAN SMOOTHING OF GRACE TEMPORAL GRAVITY VARIATION[J]. jgg, 2008, 28(3): 41-45.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2008/V28/I3/41
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