DETECTION AND PARAMETER ESTIMATION FROM ELECTROMAGNETIC SCATTERING DATA IN OFFSET/REVERSE VERTICAL SEISMIC PROFILE GEOMETRICS

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$74,705.00
Award Year:
1993
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
21060
Agency Tracking Number:
21060
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
355 Boylston St, Boston, MA, 02116
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr Alon Schatzberg
(617) 424-9295
Business Contact:
() -
Research Institute:
n/a
Abstract
DETECTION, CALSSIFICATION, AND IMAGING OF UNDERGROUND OBJECTS IS OF IMPORTANCE IN GEOPHYSICS AND GEOCHEMISTRY OF ROCK-FLUD SYSTEMS BY PROVIDING INFORMATION ON GEOLOGIC STRUCTURE AND PROVIDING A BASIS FOR INTERPRETATION OF GEOCHEMICAL REACTIONS IN POROUS AND FRACTURED ROCK. A MAXIMUM LIKELIHOOD MULTIPARAMETER ESTIMATION APPROACH TO THE PROBLEM WILL BE USED. AN UNDERGROUND OBJECT TO BE IMAGED IS PARAMETERIZED SO THAT THE SET OF PARAMETERS IS REGARDED AS REPRESENTATIVE OF THE OBJECT ITSELF. THE PHASE I GOAL IS TO ESTIMATE THIS SET OF PARAMETERS BYCOMPUTING THEIR LIKELIHOOD FUNCTIONS FROM A SUITE OF OFFSET/REVERSE VERTICAL SIESMIC PROFILING (VSP) ELECTROMAGNETIC SCATTERING EXPERIMENTS AND DETERMINING THE VALUES AT WHICH THEY PEAK. THE PARAMETERS CAN BE DISCRETE SUCH AS PRESENCE/ABSENCE OF A CERTAIN OBJECT FROM A CLASS OF POSSIBLE OBJECTS (THE DETECTION/CLASSIFICATION PROBLEM) OR CONTINUOUS SUCH AS OBJECT LOCATION, ORIENTATION, DIMENSIONS, AND CONTRAST. PHASE I WILL INVESTIGATE THE USE OF NEWLY DEVELOPED DIFFRACTION TOMOGRAPHIC MAXIMUM LIKELIHOOD ESTIMATION TECHNIQUES FOR DETECTION AND IN AN OFFSET/REVERSE VSP GEOMETRY. THE METHOD IS BASED ON AN EXACT SCATTERING AND PROPAGATION MODEL THAT INCORPORATES THE ELECTROMAGNETIC AND/OR ACOUSTIC PARAMETERS OF THE SURROUNDING GROUND AND THE POLARIZATION INFORMATION IN THE SCATTERING DATA. THE METHOD IS IDEALLY SUITED FOR ACCOMMODATION OF DATA FROM ACOUSTIC SCATTERING EXPERIMENTS FOR REFINEMENT OF THE RESULTS.

* information listed above is at the time of submission.

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