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Improvement of Downward Continuation Values of Airborne Gravity Data in Taiwan [PDF]
Remote Sensing, 2018 An airborne gravity survey was carried out to fill gaps in the gravity data for the mountainous areas of Taiwan. However, the downward continuation error of airborne gravity data is a major issue, especially in regions with complex terrain, such as ...
Qilong Zhao, Xinyu Xu, René Forsberg
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Geophysical Research Letters, 2018 Downward continuation can enhance small‐scale sources and improve resolution. Nevertheless, the common methods have disadvantages in obtaining optimal results because of divergence and instability.
Chong Zhang, Qingtian Lu, Jiayong Yan
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Evaluation and Comparison of the Processing Methods of Airborne Gravimetry Concerning the Errors Effects on Downward Continuation Results: Case Studies in Louisiana (USA) and the Tibetan Plateau (China) [PDF]
Sensors, 2017 Gravity data gaps in mountainous areas are nowadays often filled in with the data from airborne gravity surveys. Because of the errors caused by the airborne gravimeter sensors, and because of rough flight conditions, such errors cannot be completely ...
Qilong Zhao +4 more
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Remote Sensing, 2023 Downward continuation is a key technique for processing and interpreting gravity anomalies, as it has a major role in reducing values to horizontal planes and identifying small and shallow sources. However, it can be unstable and inaccurate, particularly
Chong Zhang +4 more
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Study on Parameter Choice Methods for the RFMP with Respect to Downward Continuation [PDF]
Frontiers in Applied Mathematics and Statistics, 2017 Recently, the regularized functional matching pursuit (RFMP) was introduced as a greedy algorithm for linear ill-posed inverse problems. This algorithm incorporates the Tikhonov-Phillips regularization which implies the necessity of a parameter choice ...
Martin Gutting +3 more
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A Stable and High-Precision Downward Continuation Method of Magnetic Data
Applied Sciences, 2021 Downward continuation is an effective technique that can be used to transform the magnetic data measured on one surface to the data that would be measured on another arbitrary lower surface.
Zhiwen Zhou +3 more
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High-precision downward continuation of the potential field based on the D-Unet network
Frontiers in Earth Science, 2022 Potential field data are of great significance to the study of geological characteristics. Downward continuation of the potential field converts potential field data from a high plane to a low plane. Since this method is mathematically an inverse problem
Zhihu Ye +6 more
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A dictionary learning add-on for spherical downward continuation
Journal of Geodesy, 2022 AbstractWe propose a novel dictionary learning add-on for the Inverse Problem Matching Pursuit (IPMP) algorithms for approximating spherical inverse problems such as the downward continuation of the gravitational potential. With the add-on, we aim to automatize the choice of dictionary and simultaneously reduce the computational costs.
N. Schneider, V. Michel
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Earth and Space Science, 2020 Studies of downward continuation mainly focused on improving the stability more than depth calculation. Stable downward continuation is a promising technique for estimating the depth of sources.
Yuan Yuan +5 more
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Journal of Geodetic Science, 2015 Geoid determination below the topographic surface in continental areas using analytical continuation of gravity anomaly and/or an external type of solid spherical harmonics determined by an Earth GravitationalModel (EGM) inevitably leads to a topographic
Sjöberg L. E.
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