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OK0NAG > SOLAR 01.08.11 11:54l 108 Lines 4046 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
July 2011 : 43.9 (forty-three point nine)
Maximum : 78 on 18 // Minimum : 20 on 25
Provisional daily International Sunspot Numbers for July 2011 :
1.. 38 6.. 23 11.. 51 16.. 50 21.. 41 26.. 29 31.. 67
2.. 30 7.. 28 12.. 49 17.. 63 22.. 37 27.. 43
3.. 28 8.. 43 13.. 46 18.. 78 23.. 29 28.. 65
4.. 31 9.. 33 14.. 46 19.. 74 24.. 29 29.. 61
5.. 22 10.. 40 15.. 56 20.. 48 25.. 20 30.. 62
71 cooperating stations on August 1, 10 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for January 2011 : 31.0 (+-5%)
SM CM SM CM SM CM
2011 Feb 33 33 2011 Aug 62 63 2012 Feb 99 96
Mar 36 38 Sep 68 69 Mar 108 99
Apr 42 43 Oct 73 74 Apr 118 102
May 47 48 Nov 78 80 May 127 105
Jun 52 53 Dec 84 86 Jun 136 107
Jul 57 57 2012 Jan 91 91 Jul 143 109
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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