Computation for Inversion of Two and Three-Dimensional      Magnetotelluric Data
{'Code': '06030204', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'EAR', 'LongName': 'Division Of Earth Sciences'}}
{'SignBlockName': 'Michael A. Mayhew', 'PO_EMAI': None, 'PO_PHON': None}
The PI has developed an efficient inversion method applicable to                both two and three-dimensional magnetotelluric data called the                  Rapid Relaxation Inverse (RRI).  The method is iterative and                    approximates horizontal derivatives of the electric and magnetic                fields with their values from the previous iteration.  Then the                 inverse problems for the conductivity perturbation beneath each                 site become uncoupled from each other and closely related to the                1-D problem.  The methoda is very fast, and computation time                    grows only linearly with the number of sites of data inverted.                  2-D data for realistic data sets can be inverted on high end                    technical workstations.  This grant supports further work to                    resolve certain computational difficulties, to work on large 2-D                problems and extend the method to realistic 3-D problems.
{'FirstName': 'John', 'LastName': 'Booker', 'PI_MID_INIT': 'R', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'John R Booker', 'EmailAddress': 'booker@ess.washington.edu', 'NSF_ID': '000127017', 'StartDate': '04/01/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
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{'Code': '1574', 'Text': 'Geophysics'}
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