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A computationally efficient tool for assessing the depth resolution in large-scale potential-field inversion

Valeria Paoletti, Per Christian Hansen, Mads Friis Hansen and Maurizio Fedi
A computationally efficient tool for assessing the depth resolution in large-scale potential-field inversion
Geophysics (2014) 79 (4): A33-A38

Abstract

In potential-field inversion, careful management of singular value decomposition components is crucial for obtaining information about the source distribution with respect to depth. In principle, the depth-resolution plot provides a convenient visual tool for this analysis, but its computational complexity has hitherto prevented application to large-scale problems. To analyze depth resolution in such problems, we developed a variant ApproxDRP, which is based on an iterative algorithm and therefore suited for large-scale problems because we avoid matrix factorizations and the associated demands on memory and computing time. We used the ApproxDRP to study retrievable depth resolution in inversion of the gravity field of the Neapolitan Volcanic Area. Our main contribution is the combined use of the Lanczos bidiagonalization algorithm, established in the scientific computing community, and the depth-resolution plot defined in the geoscience community.


ISSN: 0016-8033
EISSN: 1942-2156
Coden: GPYSA7
Serial Title: Geophysics
Serial Volume: 79
Serial Issue: 4
Title: A computationally efficient tool for assessing the depth resolution in large-scale potential-field inversion
Affiliation: University Federico II, Dipartimento di Scienze della Terra, Naples, Italy
Pages: A33-A38
Published: 2014
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 28
Accession Number: 2014-097188
Categories: Applied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N40°49'60" - N40°49'60", E14°07'60" - E14°07'60"
Secondary Affiliation: Technical University of Denmark, DNK, Denmark
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 201449
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