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ESTCube-1: Stepping Stone for Fast Interplanetary Travel ESTCube-1 team* Presented by Mart Noorma Tartu Observatory Estonia 1st Interplanetary CubeSat Workshop, MIT, May 30, 2012 *ESTCube-1 team Finnish Meteorological Institute University of Tartu, Estonia Tartu Observatory, Estonia Stud. of Tallinn University of Technology Stud. of Estonian Aviation Academy Stud. of Estonian University of Life Sciences Helsinki Univerisity, Finland Jyväskylä University, Finland German Aerospace Center (DLR) www.estcube.eu; facebook.com/estcube Outline Electric Solar Wind Sail (E-sail) concept Technological challanges ESTCube-1 CubeSat mission at LEO Next steps The Electric Solar Wind Sail (E-sail) Invented by Pekka Janhunen, Finnish Meteorological Institute Janhunen, P., Electric sail for spacecraft propulsion, AIAA Journal of Propulsion and Power, 20, 4, 763-764, 2004 Uses solar wind momentum for producing thrust Consists of a number of long thin conducting tethers An electron gun is used to keep the wires at high positive potential The electric field of the wires extends tens of meters into the surrounding solar wind plasma Read more at www.electric-sailing.com, where also all references can be found Electric Solar Wind Sail (E-sail) Electric Solar Wind Sail (E-sail) Technological challenges Tether production Tether deployment Imges: Dep. Physics, Helsinki University ESTCube-1 mission objectives To deploy and confirm the deployment of a 10 m conductive Heytether from a 1U CubeSat To measure the electric sail force, interacting with the tether. The success criteria for this objective is the measured effect on the satellite attitude resulting from electric sail force Launch planned for 2013 ESTCube-1 experiment Polar LEO, 600-800 km A 10 meter 4-fold 25-50 µm Heytehter at 450 V charge Deployment by centrifugal force Magnetic coils for spin up ESTCube-1 animation: Austin Hess, MIT Next steps • European Commission 7th framework program project ESAIL (2010-2013): development of full E-sail mission components to TRL 4-5 • Test of a 100 m tether deployment on Aalto-1 3U CubeSat (2014) • CubeSat mission to solar wind (next presentation) .

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