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OK0NAG > SOLAR 01.01.10 12:53l 102 Lines 3630 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
December 2009 : 10.6 (ten point six)
Maximum : 30 on 20 // Minimum : 0 on 1, 2, 3, 4, 5, 6, 7, 8, 9, 25
Provisional daily International Sunspot Numbers for December 2009 :
1.. 0 6.. 0 11.. 7 16.. 23 21.. 29 26.. 9 31.. 14
2.. 0 7.. 0 12.. 8 17.. 20 22.. 23 27.. 10
3.. 0 8.. 0 13.. 9 18.. 15 23.. 16 28.. 12
4.. 0 9.. 0 14.. 20 19.. 15 24.. 12 29.. 13
5.. 0 10.. 8 15.. 24 20.. 30 25.. 0 30.. 11
58 cooperating stations on January 1, 11 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for June 2009 : 2.7 (+-5%)
SM CM SM CM SM CM
2009 Jul 3 4 2010 Jan 3 18 2010 Jul 5 39
Aug 3 5 Feb 3 21 Aug 5 43
Sep 4 7 Mar 3 24 Sep 6 47
Oct 3 9 Apr 3 28 Oct 6 51
Nov 3 12 May 4 31 Nov 7 55
Dec 3 15 Jun 4 35 Dec 8 58
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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