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Position: Research Associate Professor
| Address: | MS 682
NASA-Goddard Space Flight Center Greenbelt, Maryland 20771 |
Chris St.Cyr's primary research is the study of the effects of the Sun on Earth and on other solar system objects. He has taken an active role over the past several years in promoting the application of solar-terrestrial physics research into the field now known as "space weather." In recent years St.Cyr has gained international recognition for his experience as a space mission architect, an operations scientist, and as a researcher in solar-terrestrial physics.
St.Cyr is a Co-Investigator on the development of the internally-occulted coronagraph (COR1) for STEREO. He is Principal Investigator for the development of a groundbased version of this instrument to examine solar wind temperature and flow speed. He has been an Operations Scientist for imaging instruments on NASA's Solar Maximum Mission (SMM) and on the ESA/NASA Solar and Heliospheric Observatory (SOHO). He was one of the primary architects of the SOHO ground system.
Ph.D. (Astronomy) University of Florida (1985)
B.S. (Astrophysics) University of Oklahoma (1975)
Present. Research Associate Professor, Department of Physics, CUA, at NASA-Goddard.
1995-2000. Senior Physicist, Computational Physics, Inc. at Naval Research Laboratory and at NASA-Goddard.
1991-1995. Senior Scientist for Engineering Systems Development, AlliedSignal Technical Services Corp. at NASA-Goddard.
1984-1991. Operations Scientist, High Altitude Observatory, National Center for Atmospheric Research at NASA-Goddard.
1981-1984. Systems Analyst, Prime Computer, Inc., New York, New York.
1976-1981. Teaching Assistant, Department of Physics and Astronomy, University of Florida.
1969-1971. U.S. Army; Honorable Discharge.
St.Cyr, O.C., and J.M. Davila, The STEREO space weather broadcast, in Space Weather Chapman Conference Proceedings, editors P. Song and G. Siscoe, in press, 2000.
St.Cyr, O.C., M.A. Mesarch, H.M. Maldonado, D.C. Folta, A.D. Harper, J.M. Davila, and R.R. Fisher, Space Weather Diamond: A four spacecraft monitoring system, Journal of Atmospheric and Solar-Terrestrial Physics, in press, 2000..
St.Cyr, O.C., R.A. Howard, N.R. Sheeley, Jr., S.P. Plunkett, D.J. Michels, S.E. Paswaters, M.J. Koomen, G.M. Simnett, B.J. Thompson, J.B. Gurman, R. Schwenn, D.F. Webb,E. Hildner, and P.L. Lamy, Properties of coronal mass ejections: SOHO LASCO observations from January 1996 to June 1998, Journ.Geophys.Res., 105, 18,169-18,185, 2000.
Gopalswamy, N., A. Lara, R.P. Lepping, M.L. Kaiser, D. Berdichevsky, and O.C. St.Cyr, Interplanetary acceleration of coronal mass ejections, Geophysical Research Letters, 27, 145-148, 2000.
Webb, D.F., E.W. Cliver, N.U. Crooker, O.C. St.Cyr, and B.J. Thompson, Relationship of halo coronal mass ejections, magnetic clouds, and magnetic storms, Journ.Geophys.Res., 105, .7,491-7,508, 2000.
Thompson, B.J., B. Reynolds, H. Aurass, N. Gopalswamy, J.B. Gurman, H.S. Hudson, S.F. Martin, and O.C. St.Cyr, Observations of the September 24, 1997 coronal flare waves, submitted to Solar Physics, 1999.
Raymond, J.C., B.J. Thompson, O.C. St.Cyr, N. Gopalswamy, S. Kahler, M. Kaiser, A. Lara, A. Ciaravella, M. Romoli, and R. O'Neal, SOHO and radio observations of a CME shock wave, Geophysical Research Letters, 27, 1,439-1,442, 2000.
St.Cyr, O.C., J.T. Burkepile, A.J. Hundhausen, and A.R. Lecinski, A comparison of ground-based and spacecraft observations of coronal mass ejections from 1980-1989, Journ.Geophys.Res., 104, 12,493-12,506, 1999.
Ciaravella, A., J.C. Raymond, L. Strachan, B.J. Thompson, O.C. St.Cyr, L. Gardner, A. Modgliani, E. Antonucci, J. Kohl, and G. Noci, Ultraviolet and optical observations of a coronal transient with SOHO, Astrophysical Journal, 510, 1053-1063, 1999.
Thompson, B.J., J.B. Gurman, W.M. Neupert, J.S. Newmark, J.-P. Delaboudiniere, O.C. St.Cyr, S. Stezelberger, K.P. Dere, R.A. Howard, and D.J. Michels, SOHO/EIT observations of the 1997 April 7 coronal transient: Possible evidence of coronal Moreton waves, Astrophys. Journ., 517, L151-L154, 1999.
Wang, Y.-M., N.R. Sheeley, Jr., R.A. Howard, O.C. St.Cyr, and G.M. Simnett, Coronagraph observations of inflows during high solar activity, Geophysical Research Letters, 26, 1,203-1,206, 1999.
Thompson, B.J., O.C. St.Cyr, S.P. Plunkett, J.B. Gurman, N. Gopalswamy, H.S. Hudson, R.A. Howard, D.J. Michels, and J.-P. Delaboudiniere, The correspondence of EUV and white light observations of coronal mass ejections with SOHO EIT and LASCO, In Sun-Earth Plasma Connections, 31-46, Geophysical Monograph #109, American Geophysical Union, 1999.
Funsten, H.O., J.T. Gosling, P. Riley, O.C. St.Cyr, R.J. Forsyth, R.A. Howard, and R. Schwenn, Combined Ulysses solar wind and SOHO coronal observations of several west limb coronal mass ejections, Journ.Geophys.Res., 104, 6,679-6,689, 1999.
Cane, H., I.G. Richardson, and O.C. St.Cyr, The interplanetary events of January-May, 1997 as inferred from energetic particle data, and their relationship with solar events, Geophysical Research Letters, 25, 2,517-2,520, 1998.
Hudson, H.S., J.R. Lemen, O.C. St.Cyr, A.C. Sterling, D.F. Webb, X-ray coronal changes during halo CMEs, Geophysical Research Letters, 25, 2,481-2,484, 1998.
Kaiser, M.L., M.J. Reiner, R.A. Howard, N. Gopalswamy, O.C. St.Cyr, B.J. Thompson, and J.-L. Bougeret, Type II radio emissions in the frequency range from 1 to 14 MHz associated with the April 7, 1997 solar event, Geophysical Research Letters, 25, 2,501-2,504, 1998.
Plunkett, S.P., B.J. Thompson, R.A. Howard, D.J. Michels, O.C. St.Cyr, S.J. Tappin, R. Schwenn, and P.L. Lamy, LASCO observations of an Earth-directed coronal mass ejection on May 12, 1997, Geophysical Research Letters, 25, 2,477-2,480, 1998.
Thompson, B.J., S.P. Plunkett, J.B. Gurman, J.S. Newmark, O.C. St.Cyr, D.J. Michels, SOHO/EIT observations of an Earth-directed coronal mass ejection on May 12, 1997, Geophysical Research Letters, 25, 2465-2468, 1998.
Webb, D.F., E.W. Cliver, N. Gopalswamy, H.S. Hudson, O.C. St.Cyr, The solar origin of the January 6, 1997, coronal mass ejection, magnetic cloud, and geomagnetic storm, Geophysical Research Letters, 25, 2469-2472, 1998.
Willson, R.F., S.L. Redfield, K.R. Lang, B.J. Thompson, and O.C. St.Cyr, First VLA observations of nonthermal metric bursts associated with coronal mass ejections detected by the Solar and Heliospheric Observatory. Ap. J., 504, L117-L121, 1998.
Brueckner, G.E. J.-P. Delaboudiniere, R.A. Howard, S.E. Paswaters, O.C. St.Cyr, R. Schwenn, P. Lamy, G.M. Simnett, B. Thompson, and D. Wang, Geomagnetic storms caused by coronal mass ejections (CMEs): March 1996 through June 1997, Geophysical Research Letters, 25, 3019-3022, 1998.
Wang, Y.-M., N.R. Sheeley, D.G. Socker, R. A. Howard, G.E. Brueckner, D.J. Michels, D. Moses, O.C. St.Cyr, A. Llebaria, and J.-P. Delaboudiniere, Observations of correlated white-light and extreme-ultraviolet jets from polar coronal holes, Ap. J., 508, 899-907, 1998.
Chen, J., R.A. Howard, G.E. Brueckner, R. Santoro, J Krall, S.E. Paswaters, O.C. St.Cyr, R. Schwenn, P. Lamy, and G.M. Simnett, Evidence of an erupting magnetic flux rope: LASCO coronal mass ejection of 1997 April 13, Astrophysical Journal, 490, L-191-L-194, 1997.
Dere, KP., and 33 co-authors, EIT and LASCO observations of the initiation of a coronal mass ejection, Solar Physics, 175 601-612, 1997.
Schwenn, R., and 23 co-authors, First view of the extended green line emission corona at solar activity minimum using the LASCO-C1 coronagraph on SOHO, Solar Physics, 175, 667-684, 1997.
Simnett, G.M., and 18 co-authors, LASCO observations of disconnected magnetic structures out to beyond 28 solar radii during coronal mass ejections, Solar Physics, 175, 685-698, 1997.
Plunkett, S.P., and 20 co-authors, The relationship of green-line transients to white-light coronal mass ejections, Solar Physics, 175, 699-718, 1997.
Sheeley, N.R., Jr., Y.-M. Wang, S.H. Hawley, G.E. Brueckner, K.P. Dere, R.A Howard, M.J. Koomen, C. M. Korendyke, D.J. Michels, S.E. Paswaters, D.G. Socker, O.C. St.Cyr, D. Wang, P.L. Lamy, A. Llebaria, R. Schwenn, G.M. Simnett, S. Plunkett, and D.A. Biesecker, Measurements of flow speeds in the corona between 2 and 30 Rsun, Astrophysical Journal, 484, 472-478, 1997.
St.Cyr, O.C., L. Sanchez-Duarte, P.C.H. Martens, J.B. Gurman, and E. Larduinat, SOHO ground segment, science operations, and data products, Solar Physics, 162, 39-59, 1995.
Hundhausen, A.J., J.T. Burkepile, and O.C. St.Cyr, Speeds of coronal mass ejections: SMM observations from 1980 and 1984-1989, Journ.Geophys.Res., 99, 6543-6552, 1994.
Gopalswamy, N., M.R. Kundu, and O.C. St.Cyr, Nonthermal radio emission associated with a coronal disconnection event, Astrophys.J., 424, L135-L138, 1994.
St.Cyr, O.C., and D.F. Webb, Activity associated with coronal mass ejections at solar minimum: SMM observations from 1984-1986, Solar Physics, 136, 379-394, 1991.
MacQueen, R.M., and O.C. St.Cyr, Sungrazing comets observed by the Solar Maximum Mission coronagraph, Icarus, 90, 96-106, 1991.
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