User Manual

WV u u = +
1
2
2
2
WD ′ =
arctan
u
u
2
1
with
0 90 ° ≤ ′ ≤ ° WD
As
u
1
and
u
2
may also be relative and arctan is only defined for a
range 0°...90°, the true direction angle
WD
is determined by fol-
lowing table:
u
1
+ - - +
u
2
+ + - -
WD ′
WD ′
180 ° − ′ WD
180 ° + ′ WD
360 ° − ′ WD
For
u
1
0 =
,
WD = ° 0
is defined.
Hardware Manual COMBILOG 1022
171