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OK0NAG > SOLAR 01.03.10 12:11l 102 Lines 3738 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
February 2010 : 18.6 (eighteen point six)
Maximum : 39 on 8 // Minimum : 8 on 4, 5
Provisional daily International Sunspot Numbers for February 2010 :
1.. 11 6.. 24 11.. 29 16.. 20 21.. 11 26.. 18
2.. 9 7.. 21 12.. 27 17.. 28 22.. 11 27.. 9
3.. 9 8.. 39 13.. 28 18.. 15 23.. 10 28.. 9
4.. 8 9.. 37 14.. 22 19.. 13 24.. 20
5.. 8 10.. 33 15.. 20 20.. 13 25.. 19
58 cooperating stations on March 1, 11 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for August 2009 : 4.8 (+-5%)
SM CM SM CM SM CM
2009 Sep 6 7 2010 Mar 5 23 2010 Sep 3 47
Oct 6 9 Apr 4 27 Oct 3 51
Nov 8 11 May 4 30 Nov 4 55
Dec 7 14 Jun 3 34 Dec 4 58
2010 Jan 6 17 Jul 3 38 2011 Jan 5 62
Feb 6 20 Aug 3 43 Feb 6 65
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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