VARIABLE;METH_DESCR AirHumidity_Relative_2m_Avg30min;relative air humidity in percent measured by a Vaisala HUMICAP 180 capacitive relative humidity sensor 2 m above ground as an average over a 30 minutes time period WindSpeed_10m_Avg30min;wind speed in m per s measured by a helicoid-shaped, four-blade propeller 10 m above ground as an average over a 30 minutes time period WindDirection_10m_Avg30min;wind direction in degree measured by a wind vane 10 m above ground, as an average over a 30 minutes time period Radiation_Global_10m_Avg30min;Global radiation in W per m2 measured by a silicon photocell sensitive to light between 350 and 1100nm 10 m above ground as an average over a 30 minutes time period Precipitation_1m_Sum30min;Precipitation in mm measured by a weighing gauge 1 m above ground as a sum of 30 minute-values AirTemperature_Absolute_2m_Avg30min;Air temperature at 2m above ground in degree celsius as an average over a 30 minutes time period AirTemperature_Absolute_2m_Avg60min;air temperature in degree C measured by a 1000om platinum resistance temperature detector PRT 2 m above ground, as an average over a 60 minutes time period AirHumidity_Relative_2m_Avg60min;relative air humidity in % measured by a Vaisala HUMICAP® 180 capacitive relative humidity sensor 2 m above ground as an average over a 60 minutes time period