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OK0NAG > SOLAR 01.04.09 10:31l 103 Lines 3737 Bytes #999 (0) @ EU
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Subj: 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
March 2009 : 0.7 (zero point seven)
Maximum : 8 on 6, 7 // Minimum : 0 on 1, 2, 3, 4, 5, 8, 9, 10, 11, 12,
13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31
Provisional daily International Sunspot Numbers for March 2009 :
1.. 0 6.. 8 11.. 0 16.. 0 21.. 0 26.. 7 31..
0
2.. 0 7.. 8 12.. 0 17.. 0 22.. 0 27.. 0
3.. 0 8.. 0 13.. 0 18.. 0 23.. 0 28.. 0
4.. 0 9.. 0 14.. 0 19.. 0 24.. 0 29.. 0
5.. 0 10.. 0 15.. 0 20.. 0 25.. 0 30.. 0
64 cooperating stations on April 1, 09 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for September 2008 : 2.3 (+-5%)
SM CM SM CM SM CM
2008 Oct 2 3 2009 Apr 9 8 2009 Oct 16 19
Nov 2 4 May 10 9 Nov 17 21
Dec 2 5 Jun 11 10 Dec 18 23
2009 Jan 6 5 Jul 12 12 2010 Jan 20 25
Feb 7 6 Aug 13 14 Feb 21 28
Mar 8 7 Sep 15 16 Mar 22 31
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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