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OK0NAG > SOLAR 01.10.08 10:08l 100 Lines 3666 Bytes #999 (0) @ EU
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Subj: Monthly Ri Report
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Date: Wed, 1 Oct 2008 09:00:47 GMT
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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
September 2008 : 1.1 (one point one)
Maximum : 9 on 23 // Minimum : 0 on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12,
13, 14, 15, 16, 17, 18, 19, 20, 21, 24, 25, 26, 27, 28, 30
Provisional daily International Sunspot Numbers for September 2008 :
1.. 0 6.. 0 11.. 7 16.. 0 21.. 0 26.. 0
2.. 0 7.. 0 12.. 0 17.. 0 22.. 8 27.. 0
3.. 0 8.. 0 13.. 0 18.. 0 23.. 9 28.. 0
4.. 0 9.. 0 14.. 0 19.. 0 24.. 0 29.. 8
5.. 0 10.. 0 15.. 0 20.. 0 25.. 0 30.. 0
67 cooperating stations on October 1, 08 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for March 2008 : 3.3 (+-5%)
SM CM SM CM SM CM
2008 Apr 4 4 2008 Oct 2 10 2009 Apr 5 22
May 3 5 Nov 3 11 May 6 24
Jun 3 6 Dec 3 12 Jun 6 27
Jul 2 7 2009 Jan 4 15 Jul 7 30
Aug 2 8 Feb 4 17 Aug 8 32
Sep 2 9 Mar 5 19 Sep 9 36
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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