Technical rule
[CURRENT]
VDI 3786 Blatt 6
VDI 3786 Blatt 6
Environmental meteorology - Meteorological measurements - Turbidity of ground level atmosphere - Meteorological optical range
Title (German)
Umweltmeteorologie - Meteorologische Messungen - Trübung der bodennahen Atmosphäre - Meteorologische Sichtweite