Journal Articles
Related to Geophex Activity and Technology

Names in
blue are current or former Geophex employees

Light Reading

I.J. Won, V.J. Murphy, P. Hubbard, A. Oren, and K.
Davis, 2004, Geophysics and weapons
inspection, The Leading Edge, a trade journal published by the Society of Exploration
Geophysicists.
July issue. pp. 658-662.

L.M. Gochioco and F. Ruev, Jr., 2006,

Detecting and imaging
hard-to-find abandoned wells and pipelines, The Leading Edge, a trade journal published by the Society of Exploration Geophysicists.

March issue. pp. 358-361.

I.J.
Won and H. Huang, 2004, Magnetometers and electro-magnetometers, The Leading Edge, a trade journal published by the Society of Exploration Geophysicists.

May
issue. pp. 448-451.

I.J.
Won, 2003, Small frequency-domain electromagnetic induction sensor:
How in the world does a small broadband EMI sensor with little or no source-receiver
separation work? The Leading Edge, a trade journal published by the Society of Exploration
Geophysicists.
April issue. pp.320-322

I.J.
Won, 1990, Guest Editorial in Groundwater Monitoring Review

Summer 1990 Issue: Diagnosing
the Earth,  v. 10,  n.3, pp.
5-8., Reprinted in the November 1992 Issue of The Leading Edge,
a trade journal published by the Society of Exploration Geophysicists.

Basic
Descriptions of the GEM Sensors and Functions

H.
Huang, 2005,
Depth of
investigation for small broadband electromagnetic sensors,
Geophysics, v. 70, n. 6, pp. G135-G142

H.
Huang and I.J. Won, 2004, Electromagnetic detection of buried metallic objects using quad-quad conductivity,
Geophysics, v. 69, n. 6, pp. 1387-1393.

I.J.
Won, Alex Oren, and Frank Funak, 2003,
GEM-2A: A programmable broadband helicopter-towed electromagnetic sensor,
Geophysics, v. 68,
n.6, pp. 1888-1895.

H. Huang

and I.J. Won, 2000,
Conductivity
and susceptibility mapping using broadband electromagnetic sensors, Journal of Environmental and Engineering Geophysics, v. 5, Issue 4, 
pp. 31-41.

I.J.
Won, D.A. Keiswetter, and E. Novikova, 1998,

Electromagnetic
induction spectroscopy, Journal of Environmental and Engineering Geophysics, v.
3, Issue 1,  pp. 27-40.

I.J.
Won, D.A. Keiswetter, D.R. Hanson, E. Novikova, and
T.M. Hall, 1997,

GEM-3:
A monostatic broadband electromagnetic induction sensor, Journal of Environmental and Engineering Geophysics, v. 2, Issue 1, pp. 53-64.

I.J. Won, D.A. Keiswetter, G.R.A.
Fields, and L.C. Sutton, 1996,
GEM-2:
A new multifrequency electromagnetic sensor, Journal of Environmental and Engineering Geophysics, v. 1, No. 2, pp. 129-138.

Articles Based on the GEM-2 Data

H.
Huang and I.J. Won,
2003, Real-time resistivity sounding using a handheld broadband electromagnetic sensor, Geophysics, v. 68, n. 4, pp. 1224-1231.

A.J.
Witten, G. Calbert, B. Witten, and T. Levy, 2003,
Magnetic and electromagnetic induction studies at archaeological sites in southwestern Jordan, Journal
of Environmental and Engineering Geophysics, v. 8, Issue 3, 
pp. 209-215.

H. Huang
and I.J. Won, 2000,

Conductivity and susceptibility mapping using broadband electromagnetic sensors, Journal of Environmental and Engineering Geophysics, v. 5, Issue 4, 
pp. 31-41.

A.J. Witten, T.E. Levy, R.B. Adams, and

I.J. Won, 2000, Geophysical
surveys in the Jebel Hamrat Fidan, Jordan, Geoarchaeology, v. 15, n. 2,
pp.
135-150.

I.J. Won and D.A. Keiswetter, 1997,
Comparison of magnetic and electromagnetic data for underground structures, Journal of Environmental and Engineering Geophysics,
v. 2, Issue 2, pp. 115-126.

D.A. Keiswetter and
I.J. Won, 1997, Multifrequency
electromagnetic signature of the Cloud Chamber, Nevada Test Site, Journal of Environmental and Engineering Geophysics, v. 2, Issue 2, pp. 99-104.

A.J. Witten, I.J. Won, and
S.J. Norton,
1997, Imaging underground structures using broadband electromagnetic induction, Journal of Environmental and Engineering Geophysics, v. 2, Issue 2, pp. 105-114.

A.J.
Witten, I.J. Won, and S.J.
Norton, 1997, Subsurface imaging with broadband
electromagnetic induction, Inverse Problems,  v. 13, pp. 1621-1639.

Articles
Based on the GEM-3 Data

H.
Huang and I.J. Won, 2003, Automated anomaly picking from broadband electromagnetic data in UXO survey, Geophysics,
v. 68, n. 6, pp.
1870-1876.

H.
Huang and I.J. Won,
2003, Detecting metal objects in magnetic environments by broadband electromagnetic method, Geophysics, v. 68, n. 6, pp. 1877-1887.

H.
Huang and I.J. Won,
2003, Automated identification of buried landmines using normalized electromagnetic induction spectroscopy, IEEE Transaction on Geoscience and Remote
Sensing, v. 41, n. 3, pp. 640-651.

H.
Huang and I.J. Won, 2003, Characterization of UXO-like targets using broadband electromagnetic induction sensors, IEEE
Transaction on Geoscience and Remote Sensing, v. 41, n. 3, pp. 652-663.

S.J.
Norton and I.J. Won, 2001, Identification of buried unexploded ordnance from broadband electromagnetic induction data, IEEE
Transaction on Geoscience and Remote Sensing, v. 39, n. 10, 

pp. 2253-2261.

I.J. Won,
D. Keiswetter, and T.H. Bell, 2001, Electromagnetic induction spectroscopy for clearing landmines, IEEE
Transaction on Geoscience and Remote Sensing, v.39, n.4, pp. 703-709.

S.
J. Norton, I. J. Won and E. R. Cespedes, 2001,
Spectral identification of
buried unexploded ordnance from low-frequency electromagnetic data, Subsurface Sensing

Technologies and Applications, v. 2, n. 3, pp.
177-190.

S.
J. Norton, I. J. Won and E. R. Cespedes, 2001, Ordnance/clutter discrimination based on target eigenvalue
analysis,

Subsurface Sensing Technologies and Applications., v. 2, n. 3, pp. 285-298.

I.J.
Won, 1995, Resolving power of some geophysical methods as applied to detecting buried unexploded ordnance, Journal of Environmental and Engineering Geophysics,

v. 0, n. 1, pp.  25-30.

Articles
Based on the GEM-2A Data

I.J.
Won, Alex Oren, and Frank Funak, 2003,
GEM-2A: A programmable broadband helicopter-towed electromagnetic sensor,
Geophysics, v. 68,
n.6, pp. 1888-1895.

H.
Huang and I.J. Won, 2002, Identification of mineral deposits using airborne electromagnetic spectra, Expanded
Abstracts, Society of Exploration Geophysics, pp. 5-8. 

Airborne
EM Data Interpretations

H.
Huang and D.C. Fraser, 2003, Inversion of helicopter electromagnetic data to a magnetic conductive layered earth, Geophysics, v. 68, n. 4, pp. 1211-1223.

H.
Huang and D.C. Fraser, 2002, Dielectric permittivity and resistivity mapping using high frequency helicopter-borne EM
data, Geophysics, v. 67, n. 3, pp. 727-738.

H.
Huang and D.C. Fraser, 2002,
The use of quad-quad resistivity in helicopter electromagnetic mapping, Geophysics, v. 67, n. 2, pp. 459-467.

H. Huang
and D.C. Fraser, 2001, Mapping of the resistivity, susceptibility, and permittivity of the earth using a helicopter-borne electromagnetic system, Geophysics, v. 66, n.1, pp.
146-157

H. Huang
and D.C. Fraser, 2000, Airborne
resistivity and susceptibility mapping in magnetically polarizable areas, Geophysics,

v. 65, n.2, pp. 502-511.

H. Huang
and D.C. Fraser,1999, Airborne
resistivity data leveling, Geophysics, v. 64, n.2, pp. 378-385.

H. Huang
and D.C. Fraser,1998,
Magnetic permeability and electrical resistivity mapping with a multifrequency airborne EM system, Exploration Geophysics, v. 29, pp. 249-253

H. Huang and D.C. Fraser, 1996, The differential parameter method for multifrequency airborne resistivity mapping,

Geophysics, v. 61, n. 1, pp. 100-109.

H. Huang and G. J. Palacky, 1991,
Damped least-square inversion of time domain airborne EM data based on singular value decomposition, Geophysical Prospecting, v. 39, pp. 827-844.

And
So Forth

Hoping
Huang, Bill SanFilipo and I.J.Won, Planetary
Exploration Using a Small Electromagnetic Sensor, IEEE
Transaction on Geoscience and Remote Sensing, v.43, n.7, pp. 1499-2005.

Geotimes,
Newsmagazine of the Earth Sciences, 2003, Inspectors
Armed with Geophysics, an article based largely on an interview with Dr.
I.J. Won of Geophex about geophysical survey used for weapons inspection in Iraq, January Issue, pp. 34-35.

I.J.
Won and E.I. Novikova, 2000,
Electromagnetic response of an earth having a continuous conductivity variation in depth,
Journal of Environmental and Engineering Geophysics, v. 5, Issue 3, 
pp. 37-44.

S.J.
Norton and I.J. Won, 2000, Time exposure ac ustics, IEEE
Transaction on Geoscience and
Remote Sensing, v. 38, n. 3, pp. 1337-1343.

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