Soler, Santiago R and Uieda, Leonardo 
ORCID: 0000-0001-6123-9515
(2021)
Gradient-boosted equivalent sources.
GEOPHYSICAL JOURNAL INTERNATIONAL, 227 (3).
pp. 1768-1783.
Abstract
<jats:title>SUMMARY</jats:title> <jats:p>The equivalent source technique is a powerful and widely used method for processing gravity and magnetic data. Nevertheless, its major drawback is the large computational cost in terms of processing time and computer memory. We present two techniques for reducing the computational cost of equivalent source processing: block-averaging source locations and the gradient-boosted equivalent source algorithm. Through block-averaging, we reduce the number of source coefficients that must be estimated while retaining the minimum desired resolution in the final processed data. With the gradient-boosting method, we estimate the sources coefficients in small batches along overlapping windows, allowing us to reduce the computer memory requirements arbitrarily to conform to the constraints of the available hardware. We show that the combination of block-averaging and gradient-boosted equivalent sources is capable of producing accurate interpolations through tests against synthetic data. Moreover, we demonstrate the feasibility of our method by gridding a gravity data set covering Australia with over 1.7 million observations using a modest personal computer.</jats:p>
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Geopotential theory, Gravity anomalies and Earth structure, Australia, Magnetic anomalies: modelling and interpretation, Inverse theory, Statistical methods |
| Divisions: | Faculty of Science and Engineering > School of Environmental Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 25 Aug 2021 10:34 |
| Last Modified: | 20 May 2023 01:10 |
| DOI: | 10.1093/gji/ggab297 |
| Open Access URL: | https://doi.org/10.31223/X58G7C |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3134694 |
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