CSSP Member Bios
J. Todd Hoeksema,Co-Chair, Stanford University
Mary K. Hudson, Co-Chair, Dartmouth College
Timothy S. Bastian, National Radio Astronomy Observatory
Amitava Bhattacharjee, Princeton University Princeton, Plasma Physics Laboratory
Stephen A. Fuselier, Southwest Research Institute
Sarah Gibson, National Center for Atmospheric Research, High Altitude Observatory
George M. Gloeckler, University of Maryland
David L. Hysell, Cornell University
Thomas Immel, University of California, Berkeley, Space Sciences Laboratory
Louis J. Lanzerotti, New Jersey Institute of Technology
Judith L. Lean, Naval Research Laboratory
Robyn Millan, Dartmouth College
Terrance G. Onsager, National Oceanic and Atmospheric Administration
Aaron Ridley, University of Michigan
Nathan A. Schwadron, University of New Hampshire, Space Plasma Physics
Michelle F. Thomsen, Los Alamos National Laboratory
Solar and Heliospheric Physics
J. TODD HOEKSEMA is a senior research scientist in the W.W. Hansen Experimental Physics Laboratory at Stanford University. His professional experience includes research administration, system and scientific programming, and the design, construction, and operation of instruments to measure solar magnetic and velocity fields from both ground and space. He is co-investigator and magnetic team lead for the Helioseismic and Magnetic Imager on NASA’s Solar Dynamics Observatory and the instrument scientist for the Michelson doppler imager instrument on the Solar and Heliospheric Observatory, which was launched by NASA and the European Space Agency. He has been associated with the Wilcox Solar Observatory at Stanford for three 11-year sunspot cycles. His primary scientific interests include the physics of the Sun and the interplanetary medium, solar-terrestrial relations, the large-scale solar and coronal magnetic fields, solar velocity fields and rotation, helioseismology, and education and public outreach. Dr. Hoeksema currently chairs the Solar Physics Division of the American Astronomical Society (AAS) and serves on the solar observatory council of the Association of Universities for Research in Astronomy (AURA). He has been a member of the heliophysics subcommittee of the NASA Advisory Council Science Committee. In 2004, NASA recognized Dr. Hoeksema’ leadership in designing solar physics’ new “roadmap” by awarding him a Distinguished Public Service Medal, NASA’s highest award for nongovernmental employees. Dr. Hoeksema also served as vice chair of Commission E.2 of the Committee on Space Research (COSPAR), which promotes international-level scientific research. He earned his Ph.D. in physics from Stanford University. Dr. Hoeksema is currently a member of the Committee for a Decadal Strategy for Solar and Space Physics (Heliophysics) and the Planning Committee on Lessons Learned in Decadal Planning in Space: A Workshop. His previous service includes membership on the Astro2010 Panel on Optical and Infrared Astronomy from the Ground.
Solar Wind-Magnetosphere Interactions and Space Weather
MARY K. HUDSON is professor of physics at Dartmouth College where she also served for 8 years as chair of physics and astronomy. Dr. Hudson was one of the principal investigators with the NSF-funded Center for Integrated Space Weather Modeling, where researchers study the weather patterns that originate from a solar eruption, following the energy and mass transfer through the interplanetary medium, all the way to the Earth’s ionosphere. Current areas of investigation include the evolution of the radiation belts; how the ionized particle outflow known as the solar wind and the magnetic field of the Sun interact with the magnetic field of the Earth, producing electrical currents in the ionosphere; and the effects of solar cosmic rays on radio communications near the Earth’s poles. She is a co-investigator on NASA’s Radiation Storm Belt Probe Mission. Dr. Hudson is also funded by NASA’s Supporting Research and Technology program, studying related effects of the Earth’s space radiation environment, which can affect both astronaut safety and satellite systems. Her research includes modeling sudden changes in relativistic electron fluxes and solar cosmic rays at and inside the 24-hour orbital period of many communication and navigation satellites, the effects of global oscillations of the Earth’s magnetic field, and associated changes in solar wind conditions that have their origins at the Sun. She has served as chair of the NSF Geospace Environment Modeling Program and she gave the American Geophysical Union (AGU) Van Allen Lecture in 2006. She is also the recipient of the American Institute of Aeronautics and Astronautics James A. Van Allen Space Environments Award for 2012. Dr. Hudson is a fellow of the AGU, and has received the AGU’s Macelwane Award. Dr. Hudson has served on Heliophysics Subcommittee of the NASA Advisory Council and numerous other NASA advisory committees. Dr. Hudson received her Ph.D. in physics from the University of California, Los Angeles. She is currently a member of the NRC Committee for a Decadal Strategy for Solar and Space Physics (Heliophysics). Her previous NRC work includes service as the vice chair of the Panel on Atmosphere-Ionosphere-Magnetosphere Interactions of the 2003 Decadal Survey in Solar and Space Physics and membership on the Committee on Solar and Space Physics, the Committee on Solar-Terrestrial Research, and the Plasma Science Committee.
TIMOTHY S. BASTIAN is assistant director and head of Science Support and Research at the National Radio Astronomy Observatory, where he has been an astronomer since 1987. He is also an adjunct faculty member in the Astronomy Department at the University of Virginia. Dr. Bastian’s research interests include solar and stellar radiophysics. He is currently the principal investigator of the Solar Radio Burst Spectrometer Project and served on the faculty of the NCAR Summer School on Heliophysics. Dr. Bastian served as scientific editor of the Astrophysical Journal. He received a B.S. in mathematics from the University of Chicago and a Ph.D. in astrophysics from University of Colorado. Dr. Bastian served on the NRC Panel on the Sun and Heliospheric Physics for the Committee for a Decadal Strategy for Solar and Space Physics (Heliophysics).
SARAH GIBSON is presently a scientist at the High Altitude Observatory (HAO) at the National Center for Atmospheric Research in Boulder, Colorado. Dr. Gibson’s positions prior to her arrival at HAO included a 1-year visit to Cambridge University as a NATO/NSF post-doctoral fellow, and nearly 4 years at NASA Goddard Space Flight Center—first as a National Research Council (NRC) associate and then as a research assistant professor at the Catholic University of America. Her primary interest is in the magnetic structure and dynamic evolution of coronal mass ejections (CMEs), and she uses theoretical CME models to explain a wide variety of space- and ground-based observations of CMEs from pre-eruption, through initiation and eruption, to their post-eruption state. A particular focus is observations and models of coronal prominence cavities, which represent dynamic equilibrium states that store magnetic energy, and Dr. Gibson leads an ISSI international working group to study coronal cavities. Dr. Gibson is also a leader of the Whole Sun Month and Whole Heliosphere Interval international coordinated observing and modeling efforts to characterize the three-dimensional, interconnected solar-heliospheric-planetary system. Dr. Gibson was the recipient of the AAS-SPD 2005 Karen Harvey Prize. She is a scientific editor for the Astrophysical Journal and serves on the Heliophysics Subcommittee of the NASA Advisory Council, on the AURA Solar Observatory Council, and as a member of the ATST Science Working Group. She obtained her Ph.D. in astrophysics from the University of Colorado, Boulder. She served on the NRC Committee for a Decadal Strategy for Solar and Space Physics (Heliophysics), the Committee on Solar and Space Physics, the Committee on Distributed Arrays of Small Instruments for Research and Monitoring in Solar-Terrestrial Physics: A Workshop, and the Astro2010 Panel on Radio, Millimeter, and Submillimeter from the Ground.
Physics of the Outer Heliosphere
NATHAN A. SCHWADRON is an associate professor at the University of New Hampshire’s (UNH) Institute for the Study of Earth, Oceans, and Space and in UNH Department of Physics. He also serves as the science operations lead for the Interstellar Boundary Explorer Mission. Dr. Schwadron’s previous experience includes positions as an associate professor of astronomy at Boston University; senior research scientist, principal scientist, and staff scientist at the Southwest Research Institute; assistant research scientist at the University of Michigan; senior research scientist at the International Space Science Institute in Bern, Switzerland; and postdoctoral scholar at the University of Michigan’s Atmospheric, Oceanic and Space Science Department. Dr. Schwadron’s research interests include heliospheric phenomena related to the solar wind, the heliospheric magnetic field, pickup ions, cometary X-rays, energetic particles, and cosmic rays. He received a B. A. with honors in physics from Oberlin College and a Ph.D. in physics from the University of Michigan. Dr. Schwadron served as a member of the NRC Panel on Solar and Heliospheric Physics for Committee for a Decadal Strategy for Solar and Space Physics (Heliophysics) and the Committee on Priorities for Space Science Enabled by Nuclear Power and Propulsion: A Vision for Beyond 2015.
GEORGE M. GLOECKLER (NAS) is a distinguished university professor, emeritus, of the University of Maryland and research professor in the Atmospheric, Oceanic and Space Sciences Department at the University of Michigan. Dr. Gloeckler’s research focuses on space plasma physics, particularly the properties of the local interstellar medium, such as its magnetic field, density and composition of its gas, and its interaction with the solar system. He is known for developing a new experimental measurement technique based on observations of interstellar pickup ions and for pioneering discoveries and the invention of instruments carried on satellites and deep space probes, including the two Voyagers, Ulysses, and Cassini. Elected to the NAS in 1997, Dr. Gloeckler is also a fellow of the American Geophysical Union (AGU) and the American Physical Society and the recipient of the COSPAR Space Science Award. He earned his Ph.D. in physics from the University of Chicago. Dr. Gloeckler’s most recent NRC service was as a member of the Panel on the Sun and Heliospheric Physics for the Committee for a Decadal Strategy for Solar and Space Physics (Heliophysics).
Solar Wind-Magnetosphere Interactions
MICHELLE F. THOMSEN is a fellow of the Los Alamos National Laboratory (LANL). Having worked as a staff scientist from 1981 until her retirement in 2009, Dr. Thomsen now works on contract with the laboratory. Her primary research activities have involved the analysis and interpretation of spacecraft data, especially plasma data from the ISEE satellites, the Cassini spacecraft to Saturn, and the Los Alamos geosynchronous satellites. She is the author or co-author of more than 360 publications. Previously, she served as the principal investigator for the plasma instruments on the geosynchronous satellites, as well as the chief scientist for space environment in the LANL High Altitude Space Monitoring program. She has also served as the acting director of the LANL Center for Space Science and Exploration. In addition, she served for 2 weeks as a Regents Lecturer at the University of California, Los Angeles (UCLA). Dr. Thomsen has received an outstanding alumni award from the University of Iowa, an honorary doctorate in science from Colorado College, and has been elected a fellow of the AGU. She has served on a number of committees and advisory and review panels for NASA, NSF, the NRC, and the AGU. She served a term as secretary for AGU’s Space Physics and Aeronomy Section (magnetosphere), she has twice served as associate editor for Geophysical Research Letters and is currently on the editorial board of Space Science Reviews. Dr. Thomsen is currently a member of NASA’s Heliophysics Advisory Subcommittee. She served a term as chair of NASA’s former Earth-Sun Systems Subcommittee. She received her Ph.D. in physics from the University of Iowa. She served on the NRC’s Committee on Solar and Space Physics and the Panel on Solar-Wind Magnetosphere Interactions of the 2003 decadal survey, and she was chair of the most recent Panel on Solar Wind-Magnetosphere Interactions for the Committee for a Decadal Strategy for Solar and Space Physics (Heliophysics).
STEPHEN A. FUSELIER is a researcher at Southwest Research Institute. Previously he served as a researcher at Lockheed Martin Advanced Technology Center. He has been involved with the development of the IMAGE (Imager for Magnetopause-to-Aurora Global Exploration) spacecraft since its inception. Dr. Fuselier served as co-investigator on two instruments on-board IMAGE: Far Ultraviolet (FUV) imagers and the Low Energy Neutral Atom (LENA) imager. He also led the U.S. investigation on the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) on the joint European Space Agency/NASA ROSETTA mission. Dr. Fuselier is the author or co-author of more than 100 scientific publications, a fellow of the AGU, and the 1995 recipient of the AGU James B. Macelwane Award. He received his Ph.D. in space plasma physics from the University of Iowa. He has previously served on the NRC Committee on Distributed Arrays of Small Instruments for Research and Monitoring in Solar-Terrestrial Physics: A Workshop, the Committee on the Assessment of the Role of Solar and Space Physics in NASA’s Space Exploration Initiative, and the Committee on Exploration of the Outer Heliosphere: A Workshop. Most recently, Dr. Fuselier served as co-chair of the Committee on Heliophysics Performance Assessment.
DAVID L. HYSELL is a professor in the Department of Earth and Atmospheric Sciences at Cornell University. As a graduate student there, he worked as a postdoctoral researcher in space plasma physics. He has also worked at Clemson University as an associate professor in the Physics Department. Dr. Hysell’s research interests are in the area of upper atmospheric physics, space plasmas, and radar remote sensing. His research also focuses on theoretical and experimental investigations of space plasmas in the Earth’s ionosphere between 80 and 1500 km altitude. Dr. Hysell has designed and built a number of small, portable coherent scatter radars for studying plasma instabilities and irregularities in the Earth’s ionosphere at low, middle, and high latitudes. Using radar interferometry and imaging techniques similar to those applied in radio astronomy and medicine, Dr. Hysell uses these radars to observe the growth, propagation, and decay of ionospheric plasma irregularities in three spatial dimensions and in time. He received his Ph.D. in physics from Cornell University. He served on the NRC Committee for a Decadal Strategy for Solar and Space Physics (Heliophysics) and is currently serving on the NRC U.S. National Committee for the International Union of Radio Science.
THOMAS J. IMMEL is an associate research physicist and senior fellow at the Space Sciences Laboratory at the University of California, Berkeley. His expertise lies in interpretation of remote-sensing data and modeling of physical processes in the upper atmosphere and ionosphere. Dr. Immel’s work has included ultraviolet imaging observations from four NASA missions: Dynamics Explorer, Polar, Imager for Magnetopause-to-Aurora Global Exploration (IMAGE), and Thermosphere, Ionosphere Mesosphere Energetics and Dynamics (TIMED). He served on the NASA Heliophysics 2009 Roadmap Team, and is currently serving on the NSF-CEDAR Science Steering Committee and the NASA Geospace Mission Operations Working Group. He was a member of the Committee on a Decadal Strategy for Solar and Space Physics as well as the decadal survey’s Panel on Atmosphere-Ionosphere-Magnetosphere Interactions. Dr. Immel is the Principal Investigator for the Ionospheric Connection Explorer (ICON), one of five Explorer-class proposals selected by NASA in September 2011 for detailed study. The ICON mission would fly instruments to understand the extreme variability in our Earth's ionosphere, which can interfere with communications and geopositioning signals. Dr. Immel received his Ph.D. in physics from the University of Alaska Fairbanks. Dr. Immel was suggested for service by Lennard Fisk, DEPS adviser, who noted a need for additional experience on the committee in the conduct of Principal Investigator-led space science missions.
JUDITH L. LEAN (NAS) is research physicist for Sun-Earth system research in the Space Science Division of the Naval Research Laboratory. After completing her Ph.D., she worked for the Cooperative Institute for Research in Environmental Sciences at the University of Colorado, Boulder, from 1980 to 1986, joining the Naval Research Laboratory in 1988. She is the recipient of a number of NASA research grants, in collaboration with other scientists, and is currently a co-investigator on the SORCE, TIMED/SEE, SDO/EVE and GLORY/TIM space missions. The focus of her research is to understand the Sun’s variability using measurements and models and determine the impact of this variability on the Earth system, including climate change, the ozone layer and space weather. She has published more than 100 papers in journals and books, and delivered more than 250 presentations documenting her research. A member of the AGU, IAGA, AAS/SPD, and AMS, Dr. Lean was elected a fellow of the AGU in 2002 and a member of National Academy of Sciences in 2003. She has served on a variety of NASA, NSF, NOAA, and NRC advisory committees. She has a Ph.D. in atmospheric physics from the University of Adelaide, Australia. Prior NRC service includes serving as a member of the Panel on Climate Variability and Change, the Committee on a Strategy to Mitigate the Impact of Sensor De-scopes and De-manifests on the NPOESS and GOES-R Spacecraft, and, most recently, the Committee on a Decadal Strategy for Solar and Space Physics.
AARON RIDLEY is an associate research professor in the Department of Atmospheric, Oceanic, and Space Sciences at the University of Michigan. He previously served as a research scientist at the Southwest Research Institute. His research interests include modeling of the near-Earth space environment, ground-based instrumentation, and small satellites. Dr. Ridley currently has active programs for ground-based magnetometers in Antartica and Fabry-Perot Interferometers in North America. He was recently awarded a grant to launch CADRE, a CubeSat that will measure the state of the upper atmosphere. Dr. Ridley has received the NASA Group Achievement Award, the University of Michigan’s College of Engineering Outstanding Research Scientist Award, and the National Center for Atmospheric Research High Altitude Observatory’s Newkirk Fellowship. He earned a Ph.D. in atmospheric and space science from the University of Michigan. He has no previous NRC experience.
TERRANCE G. ONSAGER is a physicist with the NOAA Space Weather Prediction Center. His research includes solar wind-magnetosphere coupling, modeling the signatures of magnetic reconnection at Earth’s magnetopause and in the magnetotail, and the dynamics of the electron radiation belts. His recent efforts include coordinating the capabilities and priorities of international space weather organizations to improve global space weather services and working to bridge the gap between research and operations. Currently he is the director-elect of the International Space Environment Service. He serves as co-chair of the World Meteorological Organization Inter-Programme Coordination Team on Space Weather, and he is a member of the Space Weather Expert Team for the UN Committee on the Peaceful Use of Outer Space Working Group on the Long-Term Sustainability of Outer Space. He received a Ph.D. in physics from the University of Washington with a focus on shock waves in collisionless plasma, using Earth’s bow shock as a natural laboratory. Dr. Onsager has previously served as a member of the NRC Committee on the Assessment of the Role of Solar and Space Physics in NASA’s Space Exploration Initiative and a member of the Panel on Education and Society.
LOUIS J. LANZEROTTI (NAE), distinguished research professor of physics at New Jersey Institute of Technology (NJIT), has spent four and one-half decades contributing to research that includes studies of space plasmas and geophysics and engineering problems related to the impact of atmospheric and space processes on terrestrial technologies and those in space. Prior to joining NJIT in 2003, Dr. Lanzerotti spent more than three decades at Bell Laboratories-Lucent Technologies, Murray Hill, N.J. He has been a principal investigator or co-investigator on a number of NASA Earth-orbiting, interplanetary and planetary missions including IMP (Interplanetary Monitoring Platform), Voyager, Ulysses, Galileo, and Cassini. He is currently a principal investigator for instruments to be flown in 2012 on NASA’s Radiation Belt Storm Probes mission in Earth’s magnetosphere. Dr. Lanzerotti’s research directed toward understanding Earth’s upper atmosphere and space environments has also taken him to the Antarctic and the Arctic. Dr. Lanzerotti was selected as the 2011 William Bowie Medalist of the AGU. He has also received the William Nordberg Medal for applications of space science from the International Committee on Space Research (COSPAR). Dr. Lanzerotti has been elected to the National Academy of Engineering and the International Academy of Astronautics (IAA). He is the recipient of the 2012 Basic Science Award of the IAA. He holds a B.S in engineering physics from the University of Illinois and M.S. and Ph.D. in physics from Harvard University. Dr. Lanzerotti most recently served as chair of the NRC Committee on Electronic Vehicles Controls and Unintended Acceleration and currently serves as a member of the Laboratory Assessments Board.
AMITAVA BHATTACHARJEE is a professor of astrophysical sciences at Princeton University and head of the Theory Department at the Princeton Plasma Physics Laboratory. Prior to his recent appointment at Princeton, he was the Peter Paul Professor in the Department of Physics and the Institute for the Study of Earth, Oceans, and Space at the University of New Hampshire and director of CICART (Center for Integrated Computation and Analysis of Reconnection and Turbulence), a collaborative center with Dartmouth College, supported by the Department of Energy. Dr. Bhattacharjee received his Ph.D. in theoretical plasma physics from Princeton’s Department of Astrophysical Sciences. His research interests include magnetohydrodynamics, magnetic reconnection, turbulence and singularity formation, kinetic theory, free-electron lasers, and dusty plasmas. He and his students and postdoctoral colleagues have authored over 200 publications with broad applications to laboratory, space, and astrophysical plasmas. While at the University of Iowa, he received the James Van Allen Natural Sciences Fellowship (1996) and the Faculty Scholar (1997-2000) award. He has served as associate editor of the Geophysical Research Letters and the Physics of Plasmas, as chair of the Topical Group in Plasma Astrophysics of the American Physical Society, and on various prize and fellowship committees. He has served as vice chair of the Division of Plasma Physics of the American Physical Society and senior editor of the Journal of Geophysical Research-Space Physics. He was elected a fellow of the American Physical Society in 1993, and a fellow of the American Association of Advancement of Science in 2000. Dr. Bhattacharjee earned a Ph.D. in astrophysical sciences from Princeton University. He has no prior NRC service.
ROBYN MILLAN is an associate professor of physics and astronomy at Dartmouth College. Her research includes the use of high-altitude scientific balloon experiments to study Earth’s radiation belts, specifically the loss of relativistic electrons from the outer radiation belts into Earth’s atmosphere. Dr. Millan is principal investigator for the BARREL (Balloon Array for RBSP Relativistic Electron Losses) project, which is being planned for flight in association with the Radiation Belt Storm Probe mission. Her prior positions include research appointments at Dartmouth and at the University of California, Berkeley. She received her Ph.D. in physics at the University of California, Berkeley in 2002. Dr. Millan served on the NRC Committee on the Role and Scope of Mission-Enabling Activities in NASA’s Space and Earth Science Missions and on the Panel on Solar Wind-Magnetosphere Interactions for the Committee for a Decadal Strategy for Solar and Space Physics (Heliophysics).