An improved stable downward continuation of potential fields using a truncated Taylor series and regularized vertical derivatives method

作者：Gang, Yin^*; Lin, Zhang

来源：Journal of Geophysics and Engineering, 2018, 15(5): 2001-2008.

DOI：10.1088/1742-2140/aac53a

• downward continuation
• Tikhonov regularization
• vertical derivative
• truncated Taylor series

Downward continuation of potential field plays an important role in the interpretation of gravity and magnetic field data. For its inherent instability, the continuation operation is extremely sensitive to noise. In this paper, we present an improved stable downward continuation method based on the computation of stable vertical derivatives obtained by the Tikhonov regularization and the truncated Taylor series expansion of the field. By using the Tikhonov regularization operator in the frequency domain, the filtering is also performed simultaneously while computing the vertical derivatives, and then the stable derivatives and downward continuation are obtained. The calculation results of synthetic and real data show that the proposed method can achieve stable and accurate downward continuation for the magnetic data.

• 出版日期2018-10
• 单位中国空气动力研究与发展中心