Kippzonen COMBILOG Data Logger Uživatelský manuál stáhnout pdf (Strana 170)

Standard deviation

−

∑

−

( )²

Vector mean value of wind direction (VecD) and wind

speed (VecV)

The components of the horizontal wind vector

( )



u WV WD,

are

given as single values, with

WV - wind speed

WD - wind direction

The single components of the wind vector are determined by:

( )

u WV WD

* cos

( )

u WV WD

* sin

The mean values are subsequently gained by:

u i

1 1

∑

u i

2 2

∑

with i = Summation index

n = Number of single values within averaging period

Hardware Manual COMBILOG 1022

170

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Kippzonen COMBILOG Data Logger Uživatelský manuál Strana 170