OMNIWeb Plus Browser
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Comparison of Old and New daily sunspot numbers for OMNI period

Differense between old and new versions are explaned at World Data Center for the production, preservation and dissemination of the international sunspot number:
http://sidc.oma.be/silso/datafiles

Time span 1963-01-01 - 2015-05-31

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Show Sunspots Show Ratio=New_sunspot/Old_sunspot

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If you have any questions/comments about FTPBrowser contact: Dr. Natalia Papitashvili, National Space Science Data Center, Mail Code 672, NASA/Goddard Space Flight Center, Greenbelt, MD 20771

NASA Official: Dr. Robert McGuire, Head of the Space Physics Data Facility