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Essay / Precursor Missions to the Social Orbiter (SolO) - 1457 heliosphere is created and controlled by the sun. To answer this question, he will study the formation of the solar wind in the corona, solar transients and flares as well as the solar dynamo. SolO is far from the first sun-focused satellite, and its research will build on that of several highly successful missions in the past. These include, but are by no means limited to: the Solar and Heliospheric Observatory (SoHO), a joint ESA and NASA mission whose aim was to study the outer and inner layers of the sun and to observe solar winds; the Transition Region and Coronal Explorer (TRACE), a NASA mission that took numerous photos of the photosphere and the transition region; Ulysses, another ESA/NASA mission which studied, among other things, solar winds; and the Solar Terrestrial Relations Observatory (STEREO), a mission to study coronal mass ejections. In this report, we will examine these four missions and their contributions to the SolO mission. Solar and Heliospheric Observatory The Solar and Heliospheric Observatory is an ongoing mission that, although plagued by problems, has been active for over 16 years after his initial 2nd year. lifespan of one year. [1] First launched in 1995 as a joint mission of NASA and the European Space Agency, its primary objective was the study of the different layers of the sun and their contributions to solar winds and heliophysics in general. SoHO was equipped with a suite of instruments including UV cameras, spectrographs and interferometers. Among these, one of the most active instruments was the Michelson Doppler Imager (MDI). This instrument images osci...... middle of paper ......vironment SoHOConclusionTo conclude, it is clear that each space mission must both rely on the knowledge and experience acquired during previous missions, as well as learning from the difficulties and challenges posed by its predecessors, whether it be orbit establishment, communications, or calamities such as that encountered by SoHO. Solar Orbiter will use all available information on these four missions to succeed. References[1] http://sohowww.nascom.nasa.gov/about/docs/SOHO_Fact_Sheet.pdf Accessed 02/27/2014[2] Fleck, Müller , Haugan, Duarte & Siili, 10 years of SoHO ESA Science Bulletin.[3] Solar Orbiter Definition Study Report, ESA, 2011.[4] http://trace.lmsal.com/Project/Mission/mission.htm TRACE mission description website. Accessed on 02/28/2014[5] http://trace.lmsal.com/POD/TRACEpodarchive24.html Accessed on 01/3/2014
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