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Counting Sunspots

Counting Sunspots. Leif Svalgaard Project ASTRO Aug. 3, 2013. What We are Going to Cover Today. How to find Sunspot Drawings on the Internet How to Count Groups and Spots How to Construct Your Own Sunspot Catalog Making Graphs Historical View Questions & Answers

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Counting Sunspots

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  1. Counting Sunspots Leif Svalgaard Project ASTRO Aug. 3, 2013

  2. What We are Going to Cover Today • How to find Sunspot Drawings on the Internet • How to Count Groups and Spots • How to Construct Your Own Sunspot Catalog • Making Graphs • Historical View • Questions & Answers • Looking Through a Real [Modern] Telescope

  3. Sunspot Drawings from Locarno http://www.specola.ch/e/drawings.html Click there Locarno, Switzerland

  4. Sunspot Drawings from Locarno Click Click

  5. Marco This is the drawing Get to know his handwriting… Groups Latitude Class Spots 2 7 1 1 2 Click to see a larger version 13 R = 10*g + f = 50+28 = 78 R Wolf = 0.6 * R = 51

  6. Kanzelhöhe Locarno 7 63 Kanzelhöhe 11 69 Mt. Wilson 6 25 Jul

  7. SDO/HMI Locarno E W SDO/HMI Mt. Wilson 2013-Jul-26

  8. Enter your Estimates into a Table Recall the ‘raw’ Relative Sunspot Number Definition: R = 10*groups + spots SIDC [Solar Influences Data Analysis Center] is the Official Keeper of the International Sunspot Number. They produce daily [preliminary], monthly, and yearly reports and is the definitive source for Sunspot Numbers http://sidc.be/

  9. Here is a chart I maintain daily

  10. Counting Sunspots Only Becomes Real Fun When You Make a Graph 0.6 Rudolf Wolf Alfred Wolfer You can get the NOAA sunspot number daily from http://spaceweather.com/ It does not have the 0.6 k-factor

  11. And of Great Science Value When Graphed over Many Years (Centuries) Now 2009.0

  12. Useful and Interesting Websites • http://sidc.be/products/meu/ • http://www.specola.ch/e/drawings.html • http://cesar.kso.ac.at/sunspot_drawings/ • ftp://howard.astro.ucla.edu/pub/obs/drawings • http://www.swpc.noaa.gov/ftpdir/indices/quar_DSD.txt • http://spaceweather.com/ • http://www.leif.org/research/ • http://www.swpc.noaa.gov/alerts/solar_indices.html • http://hirweb.nict.go.jp/sedoss/solact3 • http://wso.stanford.edu/

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