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In-Situ Measurements of Particles and CME Transients (IMPACT)

NSSDCA ID: 2006-047B-03

Mission Name: STEREO B
Principal Investigator:Dr. Janet G. Luhmann


The In-Situ Measurements of Particles and CME Transients (IMPACT) investigation makes observations of plasma electrons, magnetic fields and energetic particles using an array of seven instruments. The Solar Wind Electron Analyzer (SWEA) consists of a boom-mounted hemispherical top-hat electrostatic analyzer and measures the distribution function of solar wind core and halo electrons from below an eV to several keV, with high spectral and angular resolution over virtually the full spherical range. The Suprathermal Electron Telescope (STE) consists of two arrays of silicon semiconductor devices measuring ~2-20 keV electrons. The arrays look in opposite directions with 80 x 80 deg fields of view. MAG is a boom-mounted triaxial fluxgate magnetometer just inboard of the SWEA and STE instruments. The Solar Electron Proton Telescope (SEPT) consists of two dual, double-ended magnet/foil solid state detector particle telescopes that separate and measure directional fluxes of 20-400 keV electrons and 20-7000 keV protons. The Supratherman Ion Telescope (SIT) is a time-of-flight ion mass spectrometer that measures elemental composition of He-Fe ions over the 30-2000 keV/n energy range. The Low Energy Telescope (LET) is a double-fan array of 14 solid state detectors that measures 1.5-13 MeV/n protons and helium ions and 2-30 MeV/n heavier ions. The High Energy Telescope (HET) is a lin ear array of six solid state detectors that measures protons and helium ions up to 100 MeV/n and electrons up to 5 MeV.

Alternate Names


Funding Agency

  • NASA-Office of Space Science (United States)


  • Space Physics: Heliospheric Studies

Additional Information

Questions and comments about this experiment can be directed to: Dr. John F. Cooper



NameRoleOriginal AffiliationE-mail
Dr. Donald V. ReamesCo-InvestigatorNASA Goddard Space Flight
Dr. Horst W. KunowCo-InvestigatorUniversitat
Dr. Christopher T. RussellCo-InvestigatorUniversity of California, Los
Dr. Keith W. OgilvieCo-InvestigatorNASA Goddard Space Flight
Dr. Glenn M. MasonCo-InvestigatorUniversity of
Prof. Robert P. LinCo-InvestigatorUniversity of California, Berkeley
Dr. Tycho T. Von RosenvingeCo-InvestigatorNASA Goddard Space Flight
Dr. Trevor R. SandersonCo-InvestigatorESA-European Space Research and Technology Centre
Dr. Mario H. AcunaCo-InvestigatorNASA Goddard Space Flight Center
Dr. Axel KorthCo-InvestigatorMax-Planck-Institut fur
Dr. John T. GoslingCo-InvestigatorLos Alamos National
Dr. Jean-Louis Henry BougeretCo-InvestigatorObservatoire de Paris,
Dr. Richard A. MewaldtCo-InvestigatorCalifornia Institute of
Dr. Reinhold Mueller-MellinCo-InvestigatorUniversitat
Dr. Jean-Andre C. SauvaudCo-InvestigatorCNRS Centre d'Etudes Spatiale des
Dr. Tamas I. GombosiCo-InvestigatorUniversity of
Dr. Victor J. PizzoCo-InvestigatorNOAA Space Environment
Dr. Mark E. WiedenbeckCo-InvestigatorNASA Jet Propulsion
Dr. Richard G. MarsdenCo-InvestigatorESA-European Space Research and Technology
Dr. David J. McComasCo-InvestigatorSouthwest Research
Dr. Jannis S. DandourasCo-InvestigatorCNRS Centre d'Etudes Spatiale des
Dr. Stefano A. LiviCo-InvestigatorMax-Planck-Institut fur
Dr. Volker BothmerCo-InvestigatorMax-Planck-Institut fur
Dr. Jon LinkerCo-InvestigatorScience Applications International
Dr. Philippe LouarnCo-InvestigatorCNRS Centre d'Etudes Spatiale des
Dr. Stuart D. BaleCo-InvestigatorUniversity of California,
Dr. Herbert O. FunstenCo-InvestigatorLos Alamos National
Dr. Karol
Mr. Davin LarsonCo-InvestigatorUniversity of California,
Dr. Chee Keong NgCo-InvestigatorNASA Goddard Space Flight
Mr. David W. CurtisExperiment ManagerUniversity of California,
Dr. Janet G. LuhmannPrincipal InvestigatorUniversity of California,
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