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OK0NAG > SOLAR    01.08.10 12:11l 103 Lines 3772 Bytes #999 (0) @ EU
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Subj: Monthly Ri Report
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:Issued: 2010 Aug 01 1001 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
July 2010 : 16.1 (sixteen point one)

Maximum : 30 on 24 // Minimum : 8 on 1, 2, 3, 7, 8

Provisional daily International Sunspot Numbers for July 2010 : 

      1..  8    6.. 16   11.. 23   16.. 10   21.. 22   26.. 21   31.. 17

      2..  8    7..  8   12.. 22   17..  9   22.. 23   27.. 12
      3..  8    8..  8   13.. 19   18..  9   23.. 28   28.. 22
      4..  9    9.. 11   14.. 11   19..  9   24.. 30   29.. 24
      5.. 17   10.. 14   15.. 16   20.. 19   25.. 25   30.. 20

67 cooperating stations on August 1, 10 UT

Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for January 2010 :   9.3 (+-5%)

            SM    CM                 SM    CM                 SM    CM 
    

2010 Feb    11    12     2010 Aug    20    37     2011 Feb    34    64

     Mar    12    16          Sep    22    42          Mar    37    66

     Apr    13    19          Oct    24    47          Apr    40    68

     May    15    23          Nov    26    52          May    43    71

     Jun    16    27          Dec    28    56          Jun    46    73

     Jul    18    32     2011 Jan    31    60          Jul    50    75


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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