How to calculate the hourly radiation

Hourly radiation

According to the DPRA Heat stress report:

"De globale straling van het KNMI station is een som van het afgelopen uur. Om de hoeveelheid straling op het hele uur te schatten wordt de straling van het komende uur en afgelopen uur gemiddeld."

So the global radiation for the hour has to be calculated as the average of the past hour and the next hour. Additionally, the global radiation is in J / cm² and has to be converted to W / m² by multiplying:

$radiation_{hourly}={\frac {Q_{t}+Q_{t+1}}{2}}\cdot {\frac {10000}{3600}}$

Also see

For more information on the KNIM historical weather data table and how to download this information please go to the Tutorial dutch model attributes (Heat Overlay)

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