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Taylor iteration downward continuation method for gravity gradient tensor data

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Abstract

Gravity gradient tensor downward continuation can highlight the anomaly characteristics of the shallow, reflect the characteristics of abnormal body horizontal density variation. Nowadays, most gradient tensor downward continuation studies are focusing on spatial domain, and the current obstacles are slow computation speed and small downward continuation height in frequency domain research. In this study, we showed a new method to downward continuation of gravity gradient data using Taylor iteration method. The general Taylor iteration method formula was deduced, and we proved the convergence of the approach. Modeling experiment showed a good fit to large point spacing. The analysis of the iterations radio showed that the Taylor expansion item is correlated with convergence speed. Furthermore, the application to the actual data of America Vinton, LA demonstrated that Taylor iteration method has a good effect to actual data.

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Acknowledgments

This work is partially supported by Chinese National high technology research and development (963 program) Projects Nos. 2014AA06A613. We gratefully acknowledge Bell Geospace for providing the gravity gradient tensor data measured by Air-FTG in the Vinton Dome and for allowing publication of the data.

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Authors and Affiliations

  1. College of Geo-Exploration Science and Technology, Jilin University, Changchun, 130026, China

    Shuiliang Tang

  2. College of Mechanical Science and Engineering, Jilin University, Changchun, 130026, China

    Danian Huang

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  1. Shuiliang Tang
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  2. Danian Huang
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Correspondence to Shuiliang Tang.

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Tang, S., Huang, D. Taylor iteration downward continuation method for gravity gradient tensor data. Acta Geod Geophys 51, 435–449 (2016). https://doi.org/10.1007/s40328-015-0135-3

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  • DOI: https://doi.org/10.1007/s40328-015-0135-3

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