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OK0NAG > SOLAR 01.01.08 11:41l 101 Lines 3633 Bytes #999 (0) @ EU
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Subj: Monthly Ri Report
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Date: Tue, 1 Jan 2008 09:58:46 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
December 2007 : 10.1 (ten point one)
Maximum : 30 on 13 // Minimum : 0 on 19, 20, 21, 22, 23, 24, 25, 26, 27,
28, 29, 30, 31
Provisional daily International Sunspot Numbers for December 2007 :
1.. 10 6.. 16 11.. 24 16.. 18 21.. 0 26.. 0 31..
0
2.. 9 7.. 15 12.. 28 17.. 11 22.. 0 27.. 0
3.. 7 8.. 25 13.. 30 18.. 7 23.. 0 28.. 0
4.. 9 9.. 26 14.. 24 19.. 0 24.. 0 29.. 0
5.. 8 10.. 24 15.. 22 20.. 0 25.. 0 30.. 0
62 cooperating stations on January 1, 10 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for June 2007 : 7.7 (+-5%)
SM CM SM CM SM CM
2007 Jul 6 3 2008 Jan 3 4 2008 Jul 3 14
Aug 6 0 Feb 3 6 Aug 3 17
Sep 5 0 Mar 3 7 Sep 3 20
Oct 5 1 Apr 2 9 Oct 4 23
Nov 4 2 May 2 11 Nov 4 26
Dec 4 3 Jun 2 12 Dec 5 29
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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