michael l. kaiser stereo project scientist nasa/goddard space flight center

Michael L. Kaiser

STEREO Project Scientist

NASA/Goddard Space Flight Center

STEREO

June 11, 2008

STEREO at 1.4 years

STEREO-B (BEHIND) OBSERVATORY

Deployed SWAVES Electric Field Antenna

(3 places)

DeployedIMPACT Boom

IMPACTSolar Wind Electron Analyzer (SWEA)

IMPACTSuprathermal Electron Detector

(STE)

IMPACTMagnetometer

(MAG)

SECCHI Heliospheric Imager

(HI)

SECCHISun-Centered ImagingPackage (SCIP) Assy

(COR-1, COR-2, EUVI, GT)

PLASTIC Instrument

IMPACT SEP

1.1m X 2.0 m X 1.2 m

610 kg

≥ 600 W

STEREO Orbits

Sun SunEarth

Ahead @ +22/year

Behind @ -22/year

Heliocentric Inertial Coordinates(Ecliptic Plane Projection)

Geocentric Solar Ecliptic CoordinatesFixed Earth-Sun Line

(Ecliptic Plane Projection)

Ahead

BehindEarth

1 yr.

2 yr.

3 yr.4 yr.

1yr.

2yr.

3 yr.4 yr.

STEREO Space Weather Data Products

Highest resolution data – available 24-48 hrsSECCHI: 2048 X 2048 imagesIMPACT: fluxes (10s sec), moments (few sec) and B (<1 sec)PLASTIC: fluxes and moments 1 min resolutionSWAVES: intensities from all frequencies (~367) every 15 sec

Other data products – available TBDKey parametersCatalogs and event tablesMovies

Research

Beacon (space weather) data – available ‘immediately’SECCHI: ~7 256 X 256 images every hour SECCHI: ~7 256 X 256 images every hour IMPACT: 1 min aves of B, 1 min aves solar wind moments and selected SEP fluxesIMPACT: 1 min aves of B, 1 min aves solar wind moments and selected SEP fluxesPLASTIC: 1 minute resolution selected moments and fluxesPLASTIC: 1 minute resolution selected moments and fluxesSWAVES: 1 minute summaries of alternate frequencies (0.1-16 MHz)SWAVES: 1 minute summaries of alternate frequencies (0.1-16 MHz)

‘Operational’

http://stereo-ssc.nascom.nasa.gov/beacon/

Comets Lose Their Tails

EUV Wave Structure/Evolution• First EUV wave with

– High cadence (< 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

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?

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

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

STEREO Actually ‘sees’ CIRs

90° 180°STEREO separation

STEREO into cycle 24

Click here to be dazzled

http://stereo.gsfc.nasa.govor

http://www.nasa.gov/stereo