The STEREO IMPACT Suite
The Solar Terrestrial Relations Observatory (STEREO) employs two nearly identical observatories in orbit about the Sun (one moving ahead of the Earth, and one moving behind) to provide the first-ever 3-D images of coronal mass ejections (CMEs). These stereo images are supplemented by multi-point in situ measurements of solar wind and CME plasma and the energetic particles accelerated in association with solar eruptions, and by multipoint observations of radio bursts occurring in these events.
MAG
measures the three components of the vector magnetic field in the range
+/- 512 nT with 0.1 nT accuracy at 1/8 second time resolution from two
vantage points.
MAG INSTRUMENT SITE
SWEA measures the core (bulk solar wind) and halo (strahl) electron fluxes with a 360 X 60 degree or better field of view at energies 20 to 1000eV, with angular resolution of at least 45 X 45 degrees and 1-minute sampling from two vantage points.
STE measures the suprathermal halo/super-halo electron fluxes over electron energies 5 to 100 keV, spanning the gap between SWEA and SEP electron measurements, along the nominal interplanetary field direction with at least 1 minute time resolution from two vantage points. Measurements include fluxes, energy spectra, and direction of arrival. NOTE: STE-U is not working.
SEP
The Solar Energetic Particle (SEP) instrument suite provides
four solar energetic particle instruments for the IMPACT (In-Situ
Measurements of Particles and CME Transients) investigation on STEREO.
IMPACT provides measurements of solar wind and suprathermal electrons,
interplanetary magnetic fields, and solar energetic particles.
SEP
INSTRUMENT SITE
For more general information about the STEREO mission, and for verified science data products, please visit the following sites: