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Author Topic: Switching to the new Sunspot Number on July 1, 2015: a challenging transition  (Read 2263 times)

Offline ChrisSmolinski

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Switching to the new Sunspot Number on July 1, 2015: a challenging transition
« on: August 10, 2015, 1508 UTC »
On July 1st 2015, the World Data Center SILSO will lay an unprecedented milestone in the long history of the Sunspot Number.

By its longevity, this reference sunspot record remains our unique direct reference retracing solar activity over more than 4 centuries and it is definitely the most widely used solar data set (more than 100 publications per year). However, this series was left unchanged since its creation by Rudolph Wolf in 1849, without any backward verification. The only innovation came in 1998 with the creation of a new similar sunspot index, the Group Number (Hoyt and Schatten 1998). However, the two parallel series showed strong differences hinting at strong inhomogeneities in either series or both. Since 2011, a group of 40 experts finally undertook a full revision of those two series in order to identify and fix the defects. This huge work was co-organized by E. Cliver (NSO, Sacramento Peak Observatory), F. Clette (WDC-SILSO, STCE) and L. Svalgaard (Stanford University) around four successive workshops (one of them held at the Royal Observatory in Brussels in 2012.

Full article: http://www.sidc.be/press/01/welcome.html
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Offline Pigmeat

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Re: Switching to the new Sunspot Number on July 1, 2015: a challenging transition
« Reply #1 on: August 10, 2015, 1609 UTC »
Isn't that Squiggy in the back row, last on the right?
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Offline Zoidberg

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Re: Switching to the new Sunspot Number on July 1, 2015: a challenging transition
« Reply #2 on: August 10, 2015, 2147 UTC »
Quote from: Pigmeat on August 10, 2015, 1609 UTC
Isn't that Squiggy in the back row, last on the right?

You mean Squishy.  When we're talking sunspots, it's always Squishy.

When we're talking really cool DXers, then we're talking Lenny and Squiggy.

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Offline Skipmuck

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Re: Switching to the new Sunspot Number on July 1, 2015: a challenging transition
« Reply #3 on: August 10, 2015, 2353 UTC »
inhomogeneities

Gesundheit!
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Offline clobdell

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Re: Switching to the new Sunspot Number on July 1, 2015: a challenging transition
« Reply #4 on: August 11, 2015, 0141 UTC »
Can't wait until 2025 when the sunspots will cause a mini ice age, similar to the one in the 1600's ....
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Offline skeezix

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Re: Switching to the new Sunspot Number on July 1, 2015: a challenging transition
« Reply #5 on: August 15, 2015, 1558 UTC »
With the lack of sunspots in the forecast for quite a while, it is time to stake out a claim down way on VLF/ELF for a new & improved funny band.

To those that say "what about antennas & bandwidth? What about xmtrs?" I say innovate!






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Minneapolis, MN
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