ModEM: A modular system for inversion of electromagnetic geophysical data
We describe implementation of a modular system of computer codes for inversion of electromagnetic geophysical data, referred to as ModEM. The system is constructed with a fine level of modular granularity, with basic components of the inversion – forward modeling, sensitivity computations, inversion...
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          | Published in | Computers & geosciences Vol. 66; pp. 40 - 53 | 
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| Main Authors | , , , | 
| Format | Journal Article | 
| Language | English | 
| Published | 
            Elsevier Ltd
    
        01.05.2014
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| Subjects | |
| Online Access | Get full text | 
| ISSN | 0098-3004 1873-7803  | 
| DOI | 10.1016/j.cageo.2014.01.010 | 
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| Abstract | We describe implementation of a modular system of computer codes for inversion of electromagnetic geophysical data, referred to as ModEM. The system is constructed with a fine level of modular granularity, with basic components of the inversion – forward modeling, sensitivity computations, inversion search algorithms, model parametrization and regularization, data functionals – interchangeable, reusable and readily extensible. Modular sensitivity computations and generic interfaces to parallelized inversion algorithms provide a ready framework for rapid implementation of new applications or inversion algorithms. We illustrate the code׳s versatility and capabilities for code reuse through implementation of 3D magnetotelluric (MT) and controlled-source EM (CSEM) inversions, using essentially the same components.
•Parallel 2D and 3D magnetotelluric modeling and inversion tool.•Extensible to most electromagnetic data types.•Provides generic inversion and modular sensitivity computations.•Provides templates for rapid development of new applications.•Free for academic use. | 
    
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| AbstractList | We describe implementation of a modular system of computer codes for inversion of electromagnetic geophysical data, referred to as ModEM. The system is constructed with a fine level of modular granularity, with basic components of the inversion – forward modeling, sensitivity computations, inversion search algorithms, model parametrization and regularization, data functionals – interchangeable, reusable and readily extensible. Modular sensitivity computations and generic interfaces to parallelized inversion algorithms provide a ready framework for rapid implementation of new applications or inversion algorithms. We illustrate the code׳s versatility and capabilities for code reuse through implementation of 3D magnetotelluric (MT) and controlled-source EM (CSEM) inversions, using essentially the same components. We describe implementation of a modular system of computer codes for inversion of electromagnetic geophysical data, referred to as ModEM. The system is constructed with a fine level of modular granularity, with basic components of the inversion – forward modeling, sensitivity computations, inversion search algorithms, model parametrization and regularization, data functionals – interchangeable, reusable and readily extensible. Modular sensitivity computations and generic interfaces to parallelized inversion algorithms provide a ready framework for rapid implementation of new applications or inversion algorithms. We illustrate the code׳s versatility and capabilities for code reuse through implementation of 3D magnetotelluric (MT) and controlled-source EM (CSEM) inversions, using essentially the same components. •Parallel 2D and 3D magnetotelluric modeling and inversion tool.•Extensible to most electromagnetic data types.•Provides generic inversion and modular sensitivity computations.•Provides templates for rapid development of new applications.•Free for academic use.  | 
    
| Author | Tandon, Kush Kelbert, Anna Egbert, Gary D. Meqbel, Naser  | 
    
| Author_xml | – sequence: 1 givenname: Anna surname: Kelbert fullname: Kelbert, Anna email: anna@coas.oregonstate.edu organization: College of Earth, Ocean and Atmospheric Sciences, Oregon State University, 104 CEOAS Admin Bldg., Corvallis, OR 97331-5503, USA – sequence: 2 givenname: Naser surname: Meqbel fullname: Meqbel, Naser organization: College of Earth, Ocean and Atmospheric Sciences, Oregon State University, 104 CEOAS Admin Bldg., Corvallis, OR 97331-5503, USA – sequence: 3 givenname: Gary D. surname: Egbert fullname: Egbert, Gary D. organization: College of Earth, Ocean and Atmospheric Sciences, Oregon State University, 104 CEOAS Admin Bldg., Corvallis, OR 97331-5503, USA – sequence: 4 givenname: Kush surname: Tandon fullname: Tandon, Kush organization: College of Earth, Ocean and Atmospheric Sciences, Oregon State University, 104 CEOAS Admin Bldg., Corvallis, OR 97331-5503, USA  | 
    
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| Snippet | We describe implementation of a modular system of computer codes for inversion of electromagnetic geophysical data, referred to as ModEM. The system is... | 
    
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| SubjectTerms | algorithms Code reuse computers Controlled-source electromagnetics Geophysics Inversion Magnetotellurics Numerical modeling Object-oriented programming Parallelization Sensitivities  | 
    
| Title | ModEM: A modular system for inversion of electromagnetic geophysical data | 
    
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