PUBLICATIONS

First Author

1. Simpson, D.G., M.R. Collier, T.E. Moore, M-C Fok, S.A. Fuselier, and P.Wurz (2002). Direct Observations of Interstellar Neutral Atoms from IMAGE, Eos Trans. AGU, 83 (19), Spring Meet. Suppl., Abstract SH22C-05.
2. Simpson, David G. (1999). Analysis of Low-Energy Electron Diffraction I-V Spectra Using Artificial Neural Networks. (Ph.D. dissertation, University of Maryland, Baltimore County, 1999.)
3. Simpson, David G. (1999). An Alternative Lunar Ephemeris Model for On-Board Flight Software Use. In Procedings of the 1999 Flight Mechanics Symposium (ed. John P. Lynch), NASA Goddard Space Flight Center, pp. 175-184. NASA Publ. NASA/CP-1999-209235.
4. Simpson, David G. (1989). Spacecraft Attitude Determination Using the Earth's Magnetic Field. In Procedings of the 1989 Flight Mechanics & Estimation Theory Symposium, (ed. T. Stengle), NASA Goddard Space Flight Center, pp. 255-274. NASA Publ. NASA/CP-3050.

Co-Author

1. Hartle, R.E., E.C. Sittler Jr., F.M. Neubauer, R.E. Johnson, H.T. Smith, F. Crary, D.J. McComas, D.T. Young, A.J. Coates, D. Simpson, S. Bolton, D. Reisenfeld, K. Szego, J.J. Berthelier, A. Rymer, J. Vilppola, J.T. Steinberg, and N. Andre (2005), Initial Interpretation of Titan Plasma Interaction as Observed by the Cassini Plasma Spectrometer: Comparisons with Voyager 1, Planet. Space Sci., in press.
2. Sittler, E.C. Jr., M. Thomsen, R.E. Johnson, R.E. Hartle, D. Chornay, M.D. Shappirio, D. Simpson, H.T. Smith, A.J. Coates, A.M. Rymer, F. Crary, D.J. McComas, D.T. Young, D. Reisenfeld, M. Dougherty, and N. Andre (2005), Initial Results on Saturn's Inner Plasmasphere as Observed by Cassini: Comparison with Voyager, Planet. Space Sci., in press.
3. Hartle, R.E., E.C. Sittler Jr., F.M. Neubauer, R.E. Johnson, H.T. Smith, F. Crary, D.J. McComas, D.T. Young, A.J. Coates, D. Simpson, S. Bolton, D. Reisenfeld, K. Szego, J.J. Berthelier, A. Rymer, J. Vilppola, J.T. Steinberg, N. Andre (2005), Preliminary Interpretation of Plasma Interaction as Observed by the Cassini Plasma Spectrometer: Comparisons with Voyager 1, Geophys. Res. Lett., in press.
4. Sittler, E.C., Jr., M. Thomsen, D. Chornay, M.D. Shappirio, D. Simpson, R.E. Johnson, H.T. Smith, A.J. Coates, A.M. Rymer, F. Crary, D.J. McComas, D.T. Young, D. Reisenfeld, M. Dougherty, and N. Andre (2005), Preliminary results on Saturn's inner plasmasphere as observed by Cassini: Comparison with Voyager, Geophys. Res. Lett., 32, L14S07.
5. Collier, M.R., T.E. Moore, D. Simpson, A. Roberts, A. Szabo, S. Fuselier, P. Wurz, M.A. Lee, B.T. Tsurutani (2004), An unexplained 10–40° shift in the location of some diverse neutral atom data at 1 AU, Adv. Space Res., 34, 166.
6. Moore, T.E., M.R. Collier, M-C Fok, S.A. Fuselier, H. Khan, W. Lennartsson, D.G. Simpson, G.R. Wilson, M.O. Chandler (2003), Heliosphere-Geosphere Interactions Using Low Energy Neutral Atom Imaging, Space Sci. Rev., 109, 351-371.
7. Collier, M.R., T.E. Moore, K.W. Ogilvie, D.G. Simpson, M-C Fok, D. Chornay, J. Keller, S. Fuselier, J. Quinn, P. Wurz, M. Wuest, J. Hsieh, and B. Tsurutani (2002), Inner Heliospheric Gas and Dust from Solar Wind Charge Exchange, Eos Trans. AGU, 83 (19), Spring Meet. Suppl., Abstract SH22C-04.
8. Collier, M.R., T.E. Moore, D.G.Simpson, S. Fuselier, P. Wurz, D. McComas and M.A. Lee (2002), Evidence for a Thirty Degree Offset Between the Heliospheric Upstream Direction and the Peak Neutral Flux Inside of 1 AU, The World Space Congress, Houston, Texas, 10-19 October 2002, Abstract 02264.
9. Moore, Thomas E., Michael R. Collier, Mei-Ching Fok, Stephen A. Fuselier, David G. Simpson, and Peter Wurz (2002), Interstellar atom and neutral solar wind observations from IMAGE, Eos Trans. AGU, 83 (19), Spring Meet. Suppl., Abstract SH32C-01, 2002.

White Papers

1. Simpson, David G. (2005). Power Series. NASA Goddard Space Flight Center (unpublished).

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