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Title: Non Linear Conjugate Gradient

Software that 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 geometery: loops and grounded bipoles, as well as point electric and magnetic dioples. 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. 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.
Authors:
;
Publication Date:
OSTI Identifier:
1230583
Report Number(s):
NLCGCS_MPV3.0; 001365UNIXW01
R&D Project: B&R number:KC0303010; Project number:468113; LBNL CR-2265
DOE Contract Number:
DE-AC03-76SF00098
Resource Type:
Software
Software Revision:
01
Software Package Number:
001365
Software Package Contents:
Media Directory; Software Abstract; Media includes Source Code, Installation Instructions, ReadMe File; Sample Problem Input Data and Sample Problem Output Data;/1 CD ROM
Software CPU:
UNIXW
Open Source:
No
Source Code Available:
Yes
Research Org:
Lawrence Berkeley National Laboratory
Sponsoring Org:
USDOE
Country of Publication:
United States

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