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OK0NAG > SOLAR    01.04.10 12:44l 103 Lines 3770 Bytes #999 (0) @ EU
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Subj: Monthly Ri Report
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:Issued: 2010 Apr 01 1036 UTC
:Product: documentation at http://www.sidc.be/products/ri
#--------------------------------------------------------------------#

# MONTHLY REPORT ON THE INTERNATIONAL SUNSPOT NUMBER                 #

# from the SIDC (RWC-Belgium)                                        #

#--------------------------------------------------------------------#


Provisional International monthly mean Sunspot Number for
March 2010 : 15.4 (fifteen point four)

Maximum : 25 on 4 // Minimum : 0 on 6, 9, 10

Provisional daily International Sunspot Numbers for March 2010 : 

      1.. 15    6..  0   11.. 22   16.. 15   21.. 14   26.. 14   31.. 17

      2.. 24    7..  8   12.. 23   17.. 18   22.. 11   27.. 22
      3.. 23    8.. 11   13.. 20   18.. 19   23..  9   28.. 20
      4.. 25    9..  0   14.. 21   19.. 14   24.. 11   29.. 21
      5.. 18   10..  0   15.. 17   20..  9   25.. 15   30.. 21

62 cooperating stations on April 1, 10 UT

Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for September 2009 :   6.1 (+-5%)

            SM    CM                 SM    CM                 SM    CM 
    

2009 Oct     7     8     2010 Apr    16    26     2010 Oct    28    51

     Nov     8    11          May    17    29          Nov    31    55

     Dec    10    13          Jun    19    33          Dec    34    58

2010 Jan    12    16          Jul    21    37     2011 Jan    37    62

     Feb    13    19          Aug    23    42          Feb    41    65

     Mar    14    22          Sep    26    47          Mar    45    67


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

 
#--------------------------------------------------------------------#

# Solar Influences Data analysis Center - RWC Belgium                #

# Royal Observatory of Belgium                                       #

# Fax : 32 (0) 2 373 0 224                                           #

# Tel.: 32 (0) 2 373 0 491                                           #

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