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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. May 2, 2008 STEREO at 1.25 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 May 2, 2008 STEREO at 1.25 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. SECCHI

  6. IMPACT/PLASTIC

  7. IMPACT SEP

  8. Beacon Status • Receive beacon telemetry from England, Japan, and France on a regular basis – overall coverage 50-90% • Toulouse station recently added • Not certain about continued funding for station in England • Wallops tracking is top priority—paperwork is main delay • NOAA examining link margins for extended mission • All SECCHI telescopes are now included in the beacon pages. • SWAVES radio plots are now generated in realtime.

  9. March 25, 2008 – Our first big success

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

  11. 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

  12. STEREO Actually ‘sees’ CIRs

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

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

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