Curriculum Vitae
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Education | Posistions Held | Publications | Presentations



Simon George Shepherd

Research Assistant Professor and Lecturer
8000 Cummings Hall
Thayer School of Engineering
Dartmouth College
Hanover, NH 03755
email: simon at thayer.dartmouth.edu
phone: (603) 646-0096
web: http://www.engineering.dartmouth.edu/~simon/

Education

Ph.D.  physics, Dartmouth College, Hanover, NH 1993-1998
            Advisor: James LaBelle
            Thesis: "Auroral Ionospheric Electron Gyroharmonic Radio Emissions: Observation and Theory"

M.S.  mechanical engineering, University of Washington, Seattle, WA 1989-1991
            Advisor: Mark A. Ganter
            Thesis: "An Implementation of Functionally Constructed Solid Geometry"

B.A.  physics, Middlebury College, Middlebury, VT 1985-1989
            honors, magna cum laude, Phi Beta Kappa
            Advisor: Robert Gould
            Thesis: "Sonic Measurement of Wind Velocity"


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Positions Held

Research Assistant Professor and Lecturer Thayer School of Engineering, Dartmouth College 2003-present
Visiting Research Assistant Professor Thayer School of Engineering, Dartmouth College 2001-2003
Visiting Assistant Professor Department of Physics and Astronomy, Dartmouth College 2001-2002
Senior Staff Scientist Applied Physics Laboratory, Johns Hopkins University 2000-2001
Postdoctoral Physicist Applied Physics Laboratory, Johns Hopkins University 1998-2000
Research/Teaching Assistant Department of Physics and Astronomy, Dartmouth College 1993-1998
MIS Engineer Burton Snowboards, Inc., Burlington, VT 1992-1993
Software Engineer AeroHydro, Inc., Southwest Harbor, Maine 1991-1993
Research/Teaching Assistant Mechanical Engineering, University of Washington 1990-1991

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Publications

Shepherd, S. G., J. M. Ruohoniemi, and R. A. Greenwald, Direct measurements of the ionospheric convection variability near the cusp/throat, Geophys. Res. Lett., 30(21), 2109, 10.1029/2003GL01766, 2003.

Shepherd, S. G. and F. Shubitidze, Method of auxiliary sources for calculating the magnetic and electric fields induced in a layered Earth, J. Atmos. Sol.-Terr. Phys. , 65, 10.1016/S1364-6826(03)00159-7, 1151-1160, 2003.

Shepherd, S. G., R. A. Greenwald, and J. M. Ruohoniemi, Testing the Hill model of transpolar potential with Super Dual Auroral Radar Network observations, Geophys. Res. Lett., 29, 10.1029/2002GL015426, 2002.

Shepherd, S. G., R. A. Greenwald, J. M. Ruohoniemi, Cross polar cap potentials measured with Super Dual Auroral Radar Network during quasi-steady solar wind and interplanetary magnetic field conditions, J. Geophys. Res., 107(A7), 10.1029/2001JA000152, 2002.

Greenwald, R. A., S. G. Shepherd, T. S. Sotirelis, J. M. Ruohoniemi, and R. J. Barnes, Comparison of SuperDARN observations of high-latitude ionospheric irregularities and convection with DMSP observations of energetic electron and ion precipitation near the dawn and dusk local time sectors, in press, J. Geophys. Res., 2002.

Ruohoniemi, J. M., S. G. Shepherd, and R. A. Greenwald, The response of the high-latitude ionosphere to IMF variations, J. Atmos. Terr. Phys., 64, 159, 2002.

Ruohoniemi, J. M., R. J. Barnes, R. A. Greenwald, and S. G. Shepherd, The Response of the high-latitude ionosphere to the coronal mass ejection event of April 6, 2000: A practical demonstration of space weather nowcasting with the Super Dual Auroral Radar Network HF radars, J. Geophys. Res., 106, 30,085, 2001.

Shepherd, S. G. and J. M. Ruohoniemi, Electrostatic potential patterns in the high latitude ionosphere constrained by SuperDARN measurements, J. Geophys. Res., 105, 23,005, 2000.

Shepherd, S. G., R. A. Greenwald, and J. M. Ruohoniemi, A possible explanation for rapid, large-scale ionospheric responses to southward turnings of the IMF, Geophys. Res. Lett., 26, 3197, 1999.

Shepherd, S. G., J. LaBelle, G. Rostoker, and C. W. Carlson, The latitudinal dynamics of auroral roar emissions, J. Geophys. Res., 104, 17,217, 1999.

Shepherd, S. G., J. LaBelle, R. A. Doe, M. McCready, and A. T. Weatherwax, Ionospheric structure and the generation of auroral roar, J. Geophys. Res., 103, 29,253, 1998.

Yoon, P. H., A. T. Weatherwax, T. J. Rosenberg, J. LaBelle, and S. G. Shepherd, Propagation of medium frequency (1-4 MHz) auroral radio waves to the ground via the z-mode radio window, J. Geophys. Res., 103, 29,267, 1998.

Shepherd, S. G., J. LaBelle, and M. L. Trimpi, Further investigation of auroral roar fine structure, J. Geophys. Res., 103, 2231, 1998.

LaBelle, J., S. G. Shepherd, and M. L. Trimpi, Observations of auroral medium frequency bursts, J. Geophys. Res., 102, 22221, 1997.

Shepherd, S. G., J. LaBelle, and M. L. Trimpi, The polarization of auroral radio emissions, Geophys. Res. Lett., 24, 3161, 1997.

Letcher Jr., J. S., D. M. Shook, and S. G. Shepherd, Relational geometric synthesis: Part 1-framework, Computer-Aided Design, 27, 821, 1995.


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Selected Presentations (of 43 first author talks and posters)

Shepherd, S. G. and D. L. Murr, Semi-Global SuperDARN-Magnetometer Determinations of the Ionospheric Hall Conductance, (talk) Fall AGU Meeting, San Francisco, California, December 8--12, 2003.

Shepherd, S. G., J. M. Ruohoniemi, and R. A. Greenwald, SuperDARN Observations of Electric Field Variability in the Convection Throat, (talk) SuperDARN Workshop, Kiljavanrata, Finland, May 19-23, 2003.

Shepherd, S. G., J. M. Ruohoniemi, and R. A. Greenwald, SuperDARN Observations of Electric Field Variability in the Convection Throat, (invited talk) EGS/AGU/EUG Joint Assembly, Nice, France, April 6-11, 2003.

Shepherd, S. G., R. A. Greenwald, and J. M. Ruohoniemi, SuperDARN-Derived Transpolar Potentials During Steady Solar Wind and IMF Conditions, (invited talk given by Greenwald) GEM Workshop, Telluride, Colorado, June 24--28, 2002.

Shepherd, S. G. and J. M. Ruohoniemi, Convection Velocity Variability: SuperDARN Observations, (invited talk) CEDAR Workshop, Longmont Colorado, June 17--21, 2002.

Shepherd, S. G. and J. M. Ruohoniemi, Timing the ionospheric response from IMF changes near L1, (talk presented by JMR), IAGA Symposia, Hanoi, Vietnam, August 18-30, 2001.

Shepherd, S. G. and J. M. Ruohoniemi, Determination of the ionospheric convection electric potential based on SuperDARN velocity measurements, (talk presented by JMR) First S-RAMP Conference, Sapporo, Japan, October 2-6, 2000.

Shepherd, S. G. and J. M. Ruohoniemi, Electrostatic potential patterns in the high latitude ionosphere constrained by SuperDARN measurements, (poster) CEDAR Summer Workshop, Boulder, CO, June 25-30, 2000.

Shepherd, S. G. and J. M. Ruohoniemi, Evaluation of the impact of statistical models on global SuperDARN convection maps, (talk presented by JMR) SuperDARN Meeting, Beechworth, Australia, May 22-26, 2000.

Shepherd, S. G., SuperDARN: Global convection patterns from direct ionospheric measurements, (invited talk) Dartmouth College Plasma Seminar, Hanover, NH, March 7, 2000.

Shepherd, S. G., SuperDARN: A radar network for studying space physics, (invited talk) Middlebury College Physics Seminar, Middlebury, VT, March 6, 2000.

Shepherd, S. G., R. A. Greenwald, and J. M. Ruohoniemi, The character and timing of ionospheric convection responses to large, rapid southward turnings of the IMF, (poster) Eos Trans. AGU, F899, 1999.

Shepherd, S. G., R. A. Greenwald, and J. M. Ruohoniemi, The onset time of magnetic reconnection, (poster presented by JMR) IUGG Conference, Birmingham, U. K., July 18-30, 1999.

Shepherd, S. G., R. A. Greenwald, and J. M. Ruohoniemi, A possible explanation for rapid, large-scale ionospheric responses to southward turnings or the IMF, (invited talk) GEM Workshop, 1999.

Shepherd, S. G., R. A. Greenwald, and J. M. Ruohoniemi, A delay in the response of dayside convection to the arrival of a change in the IMF at the magnetopause, (poster) Eos Trans. AGU, S296, 1999.

Shepherd, S. G., H. A. Gallagher, R. A. Greenwald, and W. A. Bristow, SuperDARN data distribution: The road to despair?, (talk presented by RAG) SuperDARN Meeting, Reykjavik, Iceland, May 24-28, 1999.

Shepherd, S. G., J. LaBelle, G. Rostoker, H. al Nashi, and C. W. Carlson, The relationship between ground-level observations of auroral HF emissions and auroral boundary inferred from magnetometer data, (talk) Eos Trans. AGU, F700, 1998.

Shepherd, S. G., J. LaBelle, J. Hughes, M. L. Trimpi, M. McCready, R. A. Doe, and A. T. Weatherwax, Testing candidate mechanisms for auroral roar generation, (poster) Eos Trans. AGU, S272, 1997.

Shepherd, S. G., J. LaBelle, M. L. Trimpi, and R. Brittain, Further investigation of auroral roar fine structure, (poster) Eos Trans. AGU, S190, 1996.
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