HR: 17:45h
AN: G44A-08    [Abstracts]
TI: An Irregular-gridded Stable Potential-field Downward Continuation Method
AU: * Wang, B
EM: wang1bingzhu@yahoo.com
AF: Institute of Geophysics, China Seismological Bureau, No. 5, Minzudaxue South Road, Haidian District, Beijing, 100081 China
AB: Potential-fields downward continuation can increase the resolution, while it is an inherent ill-posed inverse problem. We advance a fast algorithm to solve the interpolation coefficients of arbitrary-spaced four variable cubic B-spline. The downward continuation, both 2D and 3D, is accomplished by solving integral equations using B-spline bases in space domain. In contrast to FFT method, our method can be irregular spacing, and the number of knots need not to be a power of 2. Through comparison with FFT method using synthetic examples, including noise-contaminated data continuation, it is found that our method is more accurate and more stable. Real data applications of B-spline method downward continuation provide very useful information for further interpretation.
DE: 3260 Inverse theory
DE: 0903 Computational methods, potential fields
SC: Geodesy [G]
MN: 2004 AGU Fall Meeting