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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
Stephen A. Fuselier, Southwest Research Institute
George M. Gloeckler (NAS), University of Maryland
Thomas Immel, University of California, Berkeley
Justin Kasper, University of Michigan
Louis J. Lanzerotti (NAE), New Jersey Institute of Technology
Judith L. Lean (NAS), Naval Research Laboratory
Elizabeth MacDonald, NASA Goddard Space Flight Center
Robyn Millan, Dartmouth College
Terrance G. Onsager, National Oceanic and Atmospheric Administration
Aaron Ridley, University of Michigan
Nathan A. Schwadron, University of New Hampshire
Joshua Semeter, Boston University


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.

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).

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.

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.

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).

THOMAS J. IMMEL is 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 other 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. Dr. Immel is the Principal Investigator for the Ionospheric Connection Explorer (ICON), a NASA Explorer mission selected for development in April 2013 for launch in 2017. ICON will 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. 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.

JUSTIN KASPER is an associate professor in the Atmospheric, Oceanic and Space Sciences Department in the University of Michigan’s College of Engineering. Prior to his recent appointment at the University of Michigan, Dr. Kasper was an astrophysicist in the Solar and Stellar X-Ray Group in the High Energy Astrophysics Division of the Harvard-Smithsonian Center for Astrophysics and a Lecturer in the Department of Astronomy at Harvard University. Dr. Kasper has worked on the development, construction, and analysis of instrumentation for the in-situ and remote measurement of particles and fields, including space-based plasma probes and particle telescopes such as the Faraday Cups on Wind, and ground-based radio telescopes including the Mileura Wide-Field Array Low Frequency Demonstrator (MWA-LFD). His major results concern heating, instabilities, and helium in the solar corona and solar wind, and the impact of space weather on society. He is currently the Principal Investigator, SWEAP Investigation, Solar Probe Plus; Instrument Lead, Faraday Cup, Deep Space Climate Observatory; Co-Investigator, FIELDS, Solar Probe Plus; Instrument Lead, Solar Wind Experiment Faraday Cup, Wind spacecraft; Project Scientist and Co-Investigator, Cosmic Ray Telescope for the Effects of Radiation, LRO; and PI of NASA and NSF grants to conduct investigations into the fundamental physics of solar corona and solar wind including heating, instabilities, composition, shocks, magnetic reconnection, radio emission. Dr. Kasper received his Ph.D. in physics from MIT. He was a member of the U.S. organizing and instrumentation committees for the 2007 International Heliophysical Year and the project scientist for the Cosmic Ray Telescope for the Effects of Radiation (CRaTER), on the Lunar Reconnaissance Orbiter. Dr. Kasper served on the Committee on a Decadal Strategy for Solar and Space Physics and was the Committee’s liaison to, and member of, the decadal survey’s Panel on Solar and Heliospheric Physics.

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.

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.

ELIZABETH MACDONALD is a research associate at NASA’s Goddard Space Flight Center. She is a civil servant research astrophysicist with expertise in both instrument development and data analysis and interpretation that comes from sounding rocket and satellite instrumentation experience. This experience ranges over the complete cycle of instrument production, including design and modeling, integration and testing, calibration, satellite operations, and in situ scientific data analysis. As a result, Dr. MacDonald is interested in instrument technology development, basic magnetospheric science, and space situational awareness national priorities. Her specific research interests include wave-particle interactions and the effect of plasma on radiation belt dynamics, mapping, coupling, and transport between the ionosphere and the inner magnetosphere, and the impact of heavy ions on geomagnetic storm processes. Currently, Dr. MacDonald is a co-investigator on the Helium, Oxygen, Proton, and Electron Spectrometer on the NASA Van Allen Belts mission. Prior to NASA, she was the principal investigator on the Z-Plasma Spectrometer on the DOE Space and Atmospheric Burst Reporting System geosynchronous payload at Los Alamos National Laboratory. She also led the Innovative Research and Integrated Sensing team at Los Alamos. Currently, she is leading the Dual Ion Spectrometer final development for the upcoming Magnetospheric Multiscale Mission as part of the Fast Plasma Investigation instrument suite. She is also the founder of, the first web and mobile platform to combine crowd sourcing and citizen science to improve space weather forecasting, specifically the visibility of the Northern Lights for the public, in the first solar maximum with social media. Dr. MacDonald earned her Ph.D. from the University of New Hampshire in 2004. She has no prior NRC experience.

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).

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.

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.

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.

JOSHUA SEMETER is a professor of Electrical and Computer Engineering at Boston University (BU). He formerly served as director of the BU Center for Space Physics. He has previously worked as a senior research engineer at SRI International and as a postdoctoral fellow at the Max Planck Institute for Extraterrestrial Physics. Dr. Semeter’s research addresses the physics and societal consequences of solar-terrestrial interactions. Activities in his lab include ionospheric radar, physical simulation and modeling, optical sensor technologies, small satellites, and the formal application of inverse theory to geophysical signals. Dr. Semeter has served on a variety of advisory committees to NSF, NASA, and the National Academies. He is the recipient of the Boston University Faculty Teaching Award, an NSF CAREER award, the CEDAR Prize Lecture, and an SRI Presidential Achievement Award. Dr. Semeter received his Ph.D. in Electrical Engineering from Boston University. Dr. Semeter previously served on the Panel on Atmosphere-Ionosphere-Magnetosphere Interactions for the decadal survey in solar and space physics.