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OK0NAG > SOLAR 01.07.09 11:33l 101 Lines 3702 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
June 2009 : 2.6 (two point six)
Maximum : 11 on 1, 2 // Minimum : 0 on 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 25, 26, 27, 28, 29, 30
Provisional daily International Sunspot Numbers for June 2009 :
1.. 11 6.. 0 11.. 0 16.. 0 21.. 7 26.. 0
2.. 11 7.. 0 12.. 0 17.. 0 22.. 8 27.. 0
3.. 10 8.. 0 13.. 0 18.. 0 23.. 7 28.. 0
4.. 9 9.. 0 14.. 0 19.. 0 24.. 8 29.. 0
5.. 8 10.. 0 15.. 0 20.. 0 25.. 0 30.. 0
65 cooperating stations on July 1, 10 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for December 2008 : 1.7 (+-5%)
SM CM SM CM SM CM
2009 Jan 2 2 2009 Jul 12 8 2010 Jan 19 19
Feb 2 3 Aug 13 9 Feb 20 21
Mar 2 4 Sep 14 10 Mar 22 23
Apr 9 5 Oct 15 12 Apr 23 26
May 10 6 Nov 17 15 May 25 28
Jun 11 7 Dec 18 17 Jun 27 32
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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