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OK0NAG > SOLAR 01.03.12 16:17l 107 Lines 4028 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
February 2012 : 33.1 (thirty-three point one)
Maximum : 61 on 1 // Minimum : 9 on 8
Provisional daily International Sunspot Numbers for February 2012 :
1.. 61 6.. 29 11.. 32 16.. 33 21.. 41 26.. 33
2.. 41 7.. 22 12.. 34 17.. 34 22.. 30 27.. 30
3.. 24 8.. 9 13.. 45 18.. 38 23.. 38 28.. 29
4.. 26 9.. 20 14.. 40 19.. 48 24.. 40 29.. 14
5.. 23 10.. 32 15.. 37 20.. 44 25.. 33
68 cooperating stations on March 1, 10 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for August 2011 : 59.0 (+-5%)
SM CM SM CM SM CM
2011 Sep 61 62 2012 Mar 93 89 2012 Sep 129 112
Oct 65 66 Apr 100 94 Oct 135 113
Nov 73 71 May 106 98 Nov 139 113
Dec 77 76 Jun 113 102 Dec 143 114
2012 Jan 82 80 Jul 119 106 2013 Jan 146 115
Feb 87 84 Aug 124 109 Feb 147 114
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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