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OK0NAG > SOLAR 01.02.08 13:01l 101 Lines 3656 Bytes #999 (0) @ EU
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Subj: Monthly Ri Report
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Subject: Monthly Ri Report
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#--------------------------------------------------------------------#
# MONTHLY REPORT ON THE INTERNATIONAL SUNSPOT NUMBER #
# from the SIDC (RWC-Belgium) #
#--------------------------------------------------------------------#
Provisional International monthly mean Sunspot Number for
January 2008 : 3.4 (three point four)
Maximum : 12 on 4 // Minimum : 0 on 9, 12, 13, 14, 15, 16, 17, 18, 19,
20, 21, 22, 23, 24, 25, 26, 27, 28, 29
Provisional daily International Sunspot Numbers for January 2008 :
1.. 7 6.. 11 11.. 8 16.. 0 21.. 0 26.. 0 31..
8
2.. 7 7.. 11 12.. 0 17.. 0 22.. 0 27.. 0
3.. 7 8.. 9 13.. 0 18.. 0 23.. 0 28.. 0
4.. 12 9.. 0 14.. 0 19.. 0 24.. 0 29.. 0
5.. 10 10.. 8 15.. 0 20.. 0 25.. 0 30.. 8
61 cooperating stations on February 1, 10 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for July 2007 : 7.0 (+-5%)
SM CM SM CM SM CM
2007 Aug 6 4 2008 Feb 3 6 2008 Aug 3 17
Sep 6 2 Mar 3 7 Sep 3 20
Oct 5 2 Apr 2 9 Oct 4 23
Nov 4 2 May 2 11 Nov 4 26
Dec 4 4 Jun 2 13 Dec 5 29
2008 Jan 3 5 Jul 3 14 2009 Jan 5 32
SM : SIDC classical method : based on an interpolation of Waldmeier's
standard curves; the estimated error ranges from 7% (first month) to
35% (last month)
CM : Combined method : the combined method is a regression technique
coupling a dynamo-based estimator with Waldmeier's idea of standard
curves, due to K. Denkmayr.
ref. : K. Denkmayr, P. Cugnon, 1997 : "About Sunspot Number Medium-Term
Predictions", in "Solar-Terrestrial Prediction Workshop V", eds.
G. Heckman et al., Hiraiso Solar Terrestrial Research Center, Japan, 103
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