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OK0NAG > SOLAR 01.06.10 11:06l 104 Lines 3800 Bytes #999 (0) @ EU
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#--------------------------------------------------------------------#
# MONTHLY REPORT ON THE INTERNATIONAL SUNSPOT NUMBER #
# from the SIDC (RWC-Belgium) #
#--------------------------------------------------------------------#
Provisional International monthly mean Sunspot Number for
May 2010 : 8.8 (eight point eight)
Maximum : 32 on 4 // Minimum : 0 on 9, 10, 11, 12, 13, 14, 15, 16, 17,
18, 19, 20
Provisional daily International Sunspot Numbers for May 2010 :
1.. 8 6.. 12 11.. 0 16.. 0 21.. 9 26.. 10 31.. 11
2.. 13 7.. 10 12.. 0 17.. 0 22.. 13 27.. 8
3.. 25 8.. 10 13.. 0 18.. 0 23.. 14 28.. 8
4.. 32 9.. 0 14.. 0 19.. 0 24.. 12 29.. 16
5.. 29 10.. 0 15.. 0 20.. 0 25.. 15 30.. 18
66 cooperating stations on June 1, 09 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for November 2009 : 7.6 (+-5%)
SM CM SM CM SM CM
2009 Dec 9 10 2010 Jun 18 31 2010 Dec 32 58
2010 Jan 10 13 Jul 20 35 2011 Jan 35 62
Feb 12 16 Aug 22 40 Feb 38 65
Mar 13 20 Sep 24 45 Mar 42 67
Apr 15 23 Oct 26 50 Apr 45 69
May 16 27 Nov 29 54 May 49 72
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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