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OK0NAG > SOLAR 01.04.08 13:00l 101 Lines 3641 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
March 2008 : 9.3 (nine point three)
Maximum : 36 on 26 // Minimum : 0 on 1, 2, 4, 5, 7, 8, 9, 11, 12, 13, 14,
18, 19, 20, 21, 22, 23
Provisional daily International Sunspot Numbers for March 2008 :
1.. 0 6.. 8 11.. 0 16.. 7 21.. 0 26.. 36 31.. 25
2.. 0 7.. 0 12.. 0 17.. 7 22.. 0 27.. 35
3.. 7 8.. 0 13.. 0 18.. 0 23.. 0 28.. 34
4.. 0 9.. 0 14.. 0 19.. 0 24.. 19 29.. 30
5.. 0 10.. 9 15.. 7 20.. 0 25.. 32 30.. 31
60 cooperating stations on April 1, 09 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for September 2007 : 5.9 (+-5%)
SM CM SM CM SM CM
2007 Oct 6 6 2008 Apr 3 8 2008 Oct 3 19
Nov 5 4 May 2 10 Nov 4 21
Dec 4 4 Jun 2 11 Dec 4 24
2008 Jan 4 5 Jul 2 12 2009 Jan 5 27
Feb 3 7 Aug 3 14 Feb 5 30
Mar 3 7 Sep 3 16 Mar 6 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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