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Estonian Student Satellite
Program ESTCube-1Urmas Kvell and the EstCube team
www.estcube.eu
• Estonian space activities
• How can we sail on Solar Wind?
• Challenging goals of ESTCube-1
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Estonia in numbers
• Population 1,3 million
• Joining ESA in 2009 as European
Cooperating State (ECS)
• Instruments on 7 space
missions before 1991
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Electric Solar Wind SailPekka Janhunen, FMI Finland, 2006
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Electric sail advantages
• Main advantages:
– No fuel needed after
deployment
– Small mass and volume
– Significant final speed
– Scalable architecture
Spacecraft Final speed
(Au/year)
Pioneer 10 2,6
Pioneer 11 2,4
Voyager 1 3,6
Voyager 2 3,3
New Horizons 2,5
NASA Interstellar
Space Probe
14
Electric Sail 10,5
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Electric sail applications
• Missions out of Solar System
• Missions towards the Sun
• Permanent position between Earth and Sun at
non-Lagrange points
– Space weather monitoring
• Mining of asteroids
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Example spacecraft
• 200 kg spacecraft:
– 100 tethers
– Effective sail area 100 km2
– Force 200 mN
– Acceleration 1 mm/s2
• Electron gun
– Solar powered
• The tether structure:
– Diameter 20 µm
– Length 20 km
– Potential +20 kV
– Hoytether design
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ESTCube-1 Mission
• Controlled deployment of a single
10 m Hoytether at Low Earth Orbit
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Thank you!
www.estcube.euwww.electric-sailing.com9/9