Foreword
1 Scope
2 Normative references
3 Terms, definitions, symbols and units
   3.1 Terms and definitions
   3.2 Symbols and units
4 Periods over which parameters are calculated
5 Air temperature
   5.1 Sources of data
   5.2 Calculation of the monthly mean
   5.3 Calculation of the standard deviation of daily means
        about the monthly mean
   5.4 Calculation of the annual mean and standard deviation
   5.5 Expression of results
6 Atmospheric humidity
   6.1 Sources of data
   6.2 Relationships between temperature and humidity parameters
   6.3 Calculation of monthly mean
   6.4 Expression of results
7 Wind speed and direction
   7.1 Methods of measurement
   7.2 Environmental influence on mean wind speed
   7.3 Statistical elements
   7.4 Expression of results
8 Precipitation
   8.1 Sources of data
   8.2 Calculation of monthly total
   8.3 Expression of results
9 Solar radiation
   9.1 Sources of data
   9.2 Calculation of monthly total solar irradiation
   9.3 Expression of results
   9.4 Estimating irradiances that are not measured
10 Longwave radiation
   10.1 General
   10.2 Sources of data
   10.3 Calculation of monthly total longwave irradiation
        from the atmosphere (sky)
   10.4 Expression of results
Annex A (informative) Methods for splitting global solar
        irradiance into the direct and diffuse parts
Annex B (informative) Methods for estimating the longwave
        atmospheric irradiances (longwave sky irradiances)
        and the sky temperature
Bibliography