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Acknowledgment for Use: You are welcome to use any graphics or photos from the CELIAS/SEM web pages for non-commercial use. When using CELIAS/SEM material, please acknowledge the CELIAS/SEM experiment on the Solar Heliospheric Observatory (SOHO) spacecraft (SOHO is a joint European Space Agency, United States National Aeronautics and Space Administration mission). For questions, please contact Leonid Didkovsky. The following graphs are data from the SEM. To view a larger graph, click on the graph image. 1996-1999  1999  1998  1997  1996  | ||
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