summer school alpbach 2013 - innovative space weather missions · summerschool alpbach at a glance...
TRANSCRIPT
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Summer School Alpbach 2013 -
Innovative Space Weather Missions
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Contents
• Space weather and its impact on Earth
• Summerschool Alpbach at a glance
• Proposed missions CARETAKER, PAC2MAN, ADONIS, OSCAR
• Scientific aspects of mission CARRINGTON
• Engineering feasibility of mission CARRINGTON
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Space weather and its impact on Earth
• CMEs affect navigation, communication,
power grids, spacecraft, radar systems, etc.
• Forecast and proper lead time to protect
systems: safe mode, standby, etc.
• Prediction of space weather events:
solar winds, CMEs, etc.
• Model development of the Sun
• Geoeffectiveness: Strongly depends on
the magnetic structure (Bz) of a CME
B
z
Bz
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Summerschool Alpbach at a glance
• Annual ten-day event at
Alpbach, Tyrol in July / August
• 60 European students work on
space-related topics
• Lectures from universities and major companies give interesting talks
• Four teams (15 students each) develop independent mission concepts
• Awards for best science case, best engineering, most competitive, etc.
• Hands-on experience in various space science / engineering fields
• Networking and organization of international collaborations
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Summerschool Alpbach at a glance
PAC2MAN
• Understand and predict CMEs and flares
• Near real-time forecast
• 2 spacecraft at L1 and around
the Sun (80°to Earth)
• 2 Soyuz launchers
• Cost Budget b€ 1.18
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Summerschool Alpbach at a glance
ADONIS
• In-situ measurement of drag
parameters
• Correlation with SWE
• Data to improve ionospheric
models
• 2 spacecraft around Eart (90°separation)
• One VEGA Launcher
• Cost Budget M€ 45
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Summerschool Alpbach at a glance
OSCAR
• Near real-time forecast and
CME trigger study
• Stereoscopic observation
In-Situ and Remote
• 2 spacecraft around Sun
(each 68°from Earth)
• 1 Soyuz launcher
• Cost Budget M€ 650
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Summerschool Alpbach at a glance
CARETAKER
• Warning System Service
• Continuous In-Situ and Remote
Determination of Velocity and
Severity of CME’s
• 6 Spacecraft @ 0.7AU
• 1 Ariane-5 Launcher
• Cost Budget b€ 1.44
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Summerschool Alpbach at a glance
http://www.summerschoolalpbach.at -> Student Presentation
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THE CARRINGTON MISSION
Mission Statement:
“Provide a CME forecast system for earth at least 3 hours in advance”
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Mission objectives
Primary:
• CME propagation trajectory and speed
• CME 3D structure
• CME shock front
• CME magnetic field orientation and magnitude
Secondary:
• CME magnetic structure at the origin
• CIR forecast
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Mission concept
ICME speed measured at 1 AU:
290 - 1300 km/s
(Cane and Richardson, 2010)
(Not to scale)
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Instruments
• Inner Coronagraph: spectropolarimetric measurement
⇨ magnetic field in the corona
• Outer Coronagraph: white light imaging between 2.5 and 30 solar radii
⇨ track the CME path
• Heliospheric imager: white light imaging between 30 and 167 solar radii
⇨ CME trajectory forecast and plasma density
• Faraday-Voigt Instrument: measure the magnetically induced birefringence with
interferometry
⇨ determination of the magnetic field orientation and strength of the CME
• Magnetometer: in-situ magnetic field measurement
⇨ verification of the remote magnetic field measurements
• Plasma package: in-situ measurement of electron and ion parameters
⇨ CIR detection
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Bz
Linear polarisation
Voigt
Effect
FaradayRotation
By
Magnetic field measurement
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Imagers
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Orbit Selection
50°separation:
• Laser path as small as possible
• Forecast time requirement
• Stereoscopig imaging
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Spacecraft
• Launcher: two Soyuz
• Transfer time 13.7 months
• Spacecraft mass: 460 kg
• Power budget: 850 W
Mission time:
6 years (possible extension of 6 years)
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Spacecraft
Particle detectors
Magnetometer
Sun Trackers
Link to Earth Faraday-Voigt Laser
Heliospheric
Imagers
Star trackers
Coronagraph
Electron
detector
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Communication and Ground Operations
Utilizing existing ESA locations where possible.
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Communication and Ground Operations
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Carrington – Space Weather Mission
• Two Soyuz Launchers
• Budget 920 M€
• Two Spacecraft @ 1 AU out to 50°
• Continous measurements of earthbound CMEs
• Warning System Providing
– Timely deliver and processing of data
– Determination of properties of CMEs