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OK0NAG > SOLAR 01.02.09 16:47l 101 Lines 3672 Bytes #999 (0) @ EU
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Subj: Monthly Ri Report
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Date: Sun, 1 Feb 2009 15:43:38 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
January 2009 : 1.5 (one point five)
Maximum : 10 on 11 // Minimum : 0 on 1, 2, 3, 4, 5, 6, 7, 8, 14, 15, 16,
17, 18, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
Provisional daily International Sunspot Numbers for January 2009 :
1.. 0 6.. 0 11.. 10 16.. 0 21.. 0 26.. 0 31..
0
2.. 0 7.. 0 12.. 8 17.. 0 22.. 0 27.. 0
3.. 0 8.. 0 13.. 7 18.. 0 23.. 0 28.. 0
4.. 0 9.. 7 14.. 0 19.. 7 24.. 0 29.. 0
5.. 0 10.. 9 15.. 0 20.. 0 25.. 0 30.. 0
60 cooperating stations on February 1, 10 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for July 2008 : 2.8 (+-5%)
SM CM SM CM SM CM
2008 Aug 2 3 2009 Feb 7 9 2009 Aug 13 20
Sep 2 4 Mar 8 10 Sep 15 22
Oct 2 5 Apr 9 11 Oct 16 24
Nov 5 6 May 10 13 Nov 17 27
Dec 6 7 Jun 11 15 Dec 18 30
2009 Jan 6 8 Jul 12 17 2010 Jan 20 33
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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