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Michael L. Kaiser STEREO Project Scientist NASA/Goddard Space Flight Center

STEREO. Michael L. Kaiser STEREO Project Scientist NASA/Goddard Space Flight Center. June 11, 2008 STEREO at 1.4 years. 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.

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Michael L. Kaiser STEREO Project Scientist NASA/Goddard Space Flight Center

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  1. STEREO Michael L. Kaiser STEREO Project Scientist NASA/Goddard Space Flight Center June 11, 2008 STEREO at 1.4 years

  2. 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)

  3. STEREO Orbits 4 yr. 3 yr. Ahead @ +22/year 2 yr. 1 yr. Sun Sun Earth 1yr. Ahead Behind @ -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)

  4. 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 (<1 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/

  5. Comets Lose Their Tails

  6. EUV Wave Structure/Evolution • A-B separation = 42 deg • Cadence = 2.5 min • Mild wavelet enhancement • First EUV wave with • High cadence (< 2.5 min) • Multi-temperature (4 wavelengths within minute) • Stereoscopic (EUVI-A, -B, EIT)

  7. EUV Wave Structure/Evolution (Implications) • Loops start to rise @ 04:21:00 UT • 10 min BEFORE wave • Wave appears @ 04:28:30 UT • No flare, no CME! • Connection between wave & rising loops? • Flare ribbons appear @ 04:31:00 UT • Wave accelerates?

  8. Eruption in the Low Corona • A-B separation = 28 deg • Cadence = 10 min • Mild wavelet enhancement

  9. 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

  10. STEREO Actually ‘sees’ CIRs

  11. STEREO into cycle 24 90° 180° STEREO separation

  12. Click here to be dazzled

  13. http://stereo.gsfc.nasa.gov or http://www.nasa.gov/stereo

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