Michael L' Kaiser

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STEREO
Michael L. Kaiser STEREO Project
Scientist NASA/Goddard Space Flight Center
June 11, 2008 STEREO at 1.4 years
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STEREO-B (BEHIND) OBSERVATORY
1.1m X 2.0 m X 1.2 m 610 kg 600 W
SECCHI Sun-Centered Imaging Package (SCIP)
Assy (COR-1, COR-2, EUVI, GT)
PLASTIC Instrument
IMPACT SEP
Deployed SWAVES Electric Field Antenna (3 places)
SECCHI Heliospheric Imager (HI)
Deployed IMPACT Boom
IMPACT Magnetometer (MAG)
IMPACT Suprathermal Electron Detector (STE)
IMPACT Solar Wind Electron Analyzer (SWEA)
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STEREO Orbits
4 yr.
3 yr.
Ahead _at_ 22?/year
2 yr.
1 yr.
Sun
Sun
Earth
1yr.
Ahead
Behind _at_ -22?/year
Earth
2yr.
Behind
3 yr.
4 yr.
Heliocentric Inertial Coordinates (Ecliptic Plane
Projection)
Geocentric Solar Ecliptic Coordinates Fixed
Earth-Sun Line (Ecliptic Plane Projection)
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STEREO Space Weather Data Products
Research
Highest resolution data available 24-48
hrs SECCHI 2048 X 2048 images IMPACT fluxes
(10s sec), moments (few sec) and B (lt1
sec) PLASTIC fluxes and moments 1 min
resolution SWAVES intensities from all
frequencies (367) every 15 sec Other data
products available TBD Key parameters Catalogs
and event tables Movies
Operational
Beacon (space weather) data available
immediately SECCHI 7 256 X 256 images every
hour IMPACT 1 min aves of B, 1 min aves solar
wind moments and selected SEP fluxes PLASTIC 1
minute resolution selected moments and
fluxes SWAVES 1 minute summaries of alternate
frequencies (0.1-16 MHz)
http//stereo-ssc.nascom.nasa.gov/beacon/
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Comets Lose Their Tails
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EUV Wave Structure/Evolution

• First EUV wave with
• High cadence (lt 2.5 min)
• Multi-temperature (4 wavelengths within minute)
• Stereoscopic (EUVI-A, -B, EIT)

• A-B separation 42 deg
• Cadence 2.5 min
• Mild wavelet enhancement

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EUV Wave Structure/Evolution (Implications)

• Loops start to rise _at_ 042100 UT
• 10 min BEFORE wave

• Wave appears _at_ 042830 UT
• No flare, no CME!
• Connection between wave rising loops?

• Flare ribbons appear _at_ 043100 UT
• Wave accelerates?

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Eruption in the Low Corona

• A-B separation 28 deg
• Cadence 10 min
• Mild wavelet enhancement

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Eruption in the Low Corona (Implications)

• Visibility of prominence top depends on
  projection
• Gap of several hours between A B.
• Height-time analyses of eruptive prominences from
  single viewpoint are unreliable for CME studies!

• The existence of kinked structures is
  projection-depended
• kinked structure seen in B, not A
• Footpoints of eruptive prominence seen in B, not
  A
• Shape, configuration of erupting structures is
  very uncertain from single viewpoint.

Kinked structures
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STEREO Actually sees CIRs
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STEREO into cycle 24
90
180
STEREO separation
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Click here to be dazzled
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http//stereo.gsfc.nasa.gov or http//www.nasa.gov
/stereo