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SOHO | 
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Solar Dynamics Observatory - SDO | 
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Big Bear Solar Observatory | 
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Learmonth, Solar Observatory Australia | 
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San Fernando Solar Observatory | 
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Kanzelhohe Solar Observatory (Austria) | 
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Mount Wilson Observatory (USA) | 
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Catania Solar Observatory (Italy) | 
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Ondrejov Observatory | 
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Nobeyama Radioheliograph | 
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Upice Observatory (Czech republic) | 
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Observatoire Paris/Meudon (LESIA) | 
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Forecast, warning centres and space weather  | 
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CERCLe: CYCLE, ERUPTIONS and COSMIC RADIATION at LESIA | 
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Nasa Space Weather Media Viewer | 
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Solar Monitor | 
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Space Environment Center, Boulder | 
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Meteosat (France) | 
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Solar observatories and data centers array(WWW servers)  | 
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THEMIS | 
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Instituto de Astrofisica de Canarias | 
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Centre de données de la Pysique des Plasmas | 
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Paris Observatory | 
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EGSO Project, European Grid of Solar Observations | 
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CLIMSO, Pic du Midi | 
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NASA/GSFC | 
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Big Bear Solar Observatory | 
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Mount Wilson Observatory | 
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Solar Observatory Kanzelhoehe (Austria) | 
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Lockheed Martin Solar and Astrophysics Laboratory (Palo Alto) | 
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Wroclaw Astronomical Observatory | 
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Debrecen Observatory | 
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Nobeyama Radioheliograph | 
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Cracow Radio Emission | 
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Centre de Données Astronomiques de Strasbourg | 
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