Campbell SAT ARGOS Bedienungsanleitung Seite 318

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ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048 Page D-14
Assumptions: This process assumes that the wind direction will not change by more
than 180 degrees between sampling
This process operates similarly to the Block Average Process
329
, but it is intended for wind direction
averaging. Unlike the Wind Vector Average Process
330
and Running Wind Vector Average Process
331
,
this process computes a scalar average of the wind direction rather than a vector average.
Coastal Environmental Systems favors the use of the Wind Vector Average
Process or Running Wind Vector Average Process over the Block Average
Direction Process because vector averaging of wind direction is more
accurate.
2.4. True Wind Vector Average Process
Inputs: 4 Wind speed
5 Wind direction
6 Compass Input
7 Vehicle Speed Over Ground
8 Vehicle Course Over Ground
Outputs: 1 Vector Average True Wind Speed
2 Vector Average True Independent Wind Direction
3 Vector Average True Component Wind Direction
4 Most Recent True Wind Speed
5 Most Recent True Independent Wind Direction
6 Most Recent True Component Wind Direction
7 Average U vector
8 Average V vector
E1 Process Error Code
Assumptions: This process assumes that you have compass data, the vehicle speed over
ground and course over ground
This process is used to calculate the true wind speed and direction from an anemometer installed on a
moving vehicle. While the vehicle is moving, the vehicle's course over ground and speed over ground
must be known to convert the measured wind speed and wind direction into true values. If no compass is
present, the orientation of the anemometer with respect to the vehicle must be known. If a compass is
available, the orientation of the anemometer with respect to the vehicle is unimportant.
329
Refer to Category #1, Process #4.
330
Refer to Category #2, Process #1.
331
Refer to Category #2, Process #2.
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