Specifications

Appendix B. Measurement Names and Meanings
B-7
(( )) ( ')/ ( /) (( ') ')/ V 44 4uNUSsNS
iii
i
N
i
N
22 2
11
21 
¦¦
The term,
(( ') ') /4
ii
sNS
2
¦
, 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
VV ()((')/) ()(( /))
//
44 4uNuUS
i

¦
212 12
21 and
have never been greater than a few degrees.
The final form is arrived at by converting from radians to degrees (57.296
degrees/radian).
V ()(( /)) ( /)
//
4uUS US  21 811
12 12