Campbell DSP4 Especificações Página 169

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Section 6. Data Table Declarations and Output Processing Instructions
The term,
(( ') ')/Θ
ii
sN
2
S
, is 0 if the deviations in speed are not
correlated with the deviation in direction. This assumption has been verified in
tests on wind data by CSI; the Air Resources Laboratory, NOAA, Idaho Falls,
ID; and MERDI, Butte, MT. In these tests, the maximum differences in
σσ
()((')/) ()(( /))
//
ΘΘ ΘuNuU
i
==S
212 1
21 and
2
have never been greater than a few degrees.
The final form is arrived at by converting from radians to degrees (57.296
degrees/radian).
σ
( ) (( /)) ( /)
/
ΘuUS US=− =−21 811
12 12/
6-35
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