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ESTS1365 NLCGCS_MPV3.0. (Abstract last modified 04-DEC-2007)


NLCGCS_MPV3.0, Inversion of electromagnetic fields for subsurface electrical properties

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Abstract Table of Contents:

NAME | COMPUTER | PROBLEM | SOLUTION | RESTRICTIONS | CPU | FEATURES | AUXILIARIES | STATUS | REFERENCES | REQUIREMENTS | LANGUAGE | OPERATING SYSTEM | OTHER RESTRICTIONS | AUTHOR | MATERIAL | CATEGORIES |

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1. NAME OR DESIGNATION OF PROGRAM - NLCGCS_MPV3.0


2. COMPUTER FOR WHICH THIS PACKAGE IS DESIGNED -

To request or retrieve programs click on the one of the active versions below. A password and special authorization is required.

Explanation of the status codes.

Program-name         Package-ID  Status
NLCGCS_MPV3.0        ESTS1365/01 Arrived

Machines used:
Package-ID     Orig.Computer                       Test Computer
ESTS1365/01    UNIX gen. W.S.                      

3. DESCRIPTION OF PROGRAM OR FUNCTION - NLCGCS_MPV3.0 (Non Linear Conjugate Gradient) simulates and inverts electromagnetic field data for subsurface electrical properties (electrical conductivity) of geological media. The software treats data produced by a time harmonic source field excitation arising from the following antenna geometry: loops and grounded bipoles, as well as point electric and magnetic dipoles. The software is an upgrade from the code NLCGCS_MP ver 1.0.
  
The upgrade includes the following components: Incorporation of new 1 D field sourcing routines to more accurately simulate the 3D electromagnetic field for arbitrary geologic media, treatment for generalized finite length transmitting antenna geometry (antennas with vertical and horizontal component directions). In addition, the software has been upgraded to treat transverse anisotropy in electrical conductivity.


4. METHODS - The inversion process is carried out using a non-linear conjugate gradient optimization scheme, which minimizes the misfit between field data and model data using a least squares criteria.


9. STATUS
ESTS1365/01: 04-DEC-2007 Masterfiled Arrived


10. REFERENCES  - 
- Newman, G.A., and Boggs, P.:
2004, Solution acceleration for large-scale three-dimensional electromagnetic inverse problems: Inverse Problems, 20, S151-S170.
ESTS1365/01:


11. HARDWARE REQUIREMENTS - Unix workstation.


12. PROGRAMMING LANGUAGE -ESTS1365/01: FORTRAN-90 


13. SOFTWARE REQUIREMENTS - Unix.


15. NAME AND ESTABLISHMENT OF AUTHORS -
Gregory A. Newman and Michael Commer
Lawrence Berkeley National Laboratory
Berkeley, CA 94720
USA


16. MATERIAL AVAILABLE -ESTS1365/01:
Source Code
Installation Instructions
ReadMe File
Sample Problem Input Data
Sample Problem Output Data


17. CATEGORIES  - 

- R.  Environmental and Earth Sciences


Keywords: ELECTRIC FIELDS, GEOLOGIC STRATA, MAGNETIC FIELDS, NONLINEAR

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