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The Extreme Ultraviolet Imager of the
STEREO SECCHI instrument (EUVI) will observe the photospheric magnetic
field, chromosphere, and innermost corona. It is akin to the Extreme
ultraviolet Imaging Telescope (EIT) on the Solar and Heliospheric
Observatory (SOHO) satellite mission. The image to the left is from
SOHO EIT Fe XII (195 Å) bandpass.
In our sample scenario, STEREO B sees major activity near the central disk in the EUVI image At the same time, STEREO A sees... |
| STEREO B: SECCHI COR1 Science |
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The inner coronograph of the STEREO
SECCHI instrument (COR1) will observe the solar corona over the range
1.1 - 3.0 solar radii. It is akin to the LASCO C2 coronograph on the
Solar and Heliospheric Observatory (SOHO) satellite mission. The image
to the left is from LASCO C2.
STEREO B sees a "halo" CME in the coronagraph image At the same time, STEREO A sees... |
| STEREO B: SECCHI COR2 Science |
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The outer coronograph of the STEREO
SECCHI instrument (COR2) will observe the solar corona over the range 2
- 15 solar radii. It is akin to the LASCO C3 coronograph on the Solar
and Heliospheric Observatory (SOHO) satellite mission. The image to the
left is from LASCO C3.
STEREO B sees the "halo" CME moving out into the heliosphere toward the spacecraft At the same time, STEREO A sees.. |
| STEREO B: In-situ Perspective |
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| The above illustration shows the type of "gradual" SEP event that arrives at an observer in advance of the CME shock (left). These occur following observation of a "halo" CME in the coronagraph images and are the most intense SEP events. The coronagraph may experience SEP "snow" in its images on these occasions (right). | |
