Parameters

DD

Wind direction

FF

Wind speed (FFE, FFN longitudinal and latitudinal part of the wind speed)

FX

Gust peak speed (format "sia 2028" only)

H

Time integrated radiation (energy units)

G

Average hourly radiation intensity (power units)

hs

Height of sun [°]

mx

Mixing ratio [g/kg]

N

Cloud cover [octas]

LG

Global illuminance [lux]

LD

Diffuse illuminance [lux]

p

Atmospheric pressure [hPa]

RD

Days with precipitation (> 0.1 mm)

RR

Precipitation [mm]

RH

Relative humidity [%]

w

Precipitable water [cm]

dr

Driving rain [mm]

Snd

Snow depth [mm] (theoretical for average snow density)

rho

Albedo

Sd

Sunshine duration [h]

Ta

Air temperature (2 m above ground)

Ta min/max

Lowest/highest hourly value of air temperature (per month)

Ta dmin/dmax

Average lowest/highest daily temperature

Td

Dewpoint temperature

Tp

Wet bulb temperature

Ts

Surface temperature (5 cm above ground / grass)

tl

Linke turbidity factor [-]

Bh

Direct horizontal radiation arising from a narrow solid angle of 6° centered around the sun

Bn

Direct normal radiation (DNI, beam) arising from a narrow solid angle of 6° centered around the sun's disk

Dh

Diffuse radiation arising from the upper hemisphere reduced by the direct solar radiation from the sun's disk and its surroundings (6° aperture)

Dh hor

Diffuse radiation taking raised horizon into account

Dh min

Diffuse radiation under clear skys

Gh

Global horizontal radiation ("GHI")

Gh hor

Global radiation taking raised horizon into account

Ghmax

Global radiation under clear skys