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OK0NAG > SOLAR 01.07.11 16:18l 107 Lines 4037 Bytes #999 (0) @ EU
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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
June 2011 : 37.0 (thirty-seven point zero)
Maximum : 89 on 2 // Minimum : 10 on 13, 27
Provisional daily International Sunspot Numbers for June 2011 :
1.. 83 6.. 46 11.. 15 16.. 39 21.. 33 26.. 18
2.. 89 7.. 38 12.. 11 17.. 39 22.. 33 27.. 10
3.. 86 8.. 30 13.. 10 18.. 40 23.. 38 28.. 25
4.. 76 9.. 26 14.. 24 19.. 31 24.. 43 29.. 27
5.. 53 10.. 22 15.. 34 20.. 26 25.. 33 30.. 32
70 cooperating stations on July 1, 14 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for December 2010 : 28.8 (+-5%)
SM CM SM CM SM CM
2011 Jan 31 32 2011 Jul 59 61 2012 Jan 95 93
Feb 33 37 Aug 64 66 Feb 103 96
Mar 38 42 Sep 70 72 Mar 113 99
Apr 43 46 Oct 75 77 Apr 124 102
May 48 52 Nov 81 83 May 134 105
Jun 53 56 Dec 88 88 Jun 143 107
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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