Campbell SAT ARGOS Manual de usuario Pagina 317

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ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048 Page D-13
15 Wind Direction during Running Maximum Wind Gust Speed
16 Running Vector Average Component Wind Direction
17 Vector Average (Not Running) Component Wind Direction
18 Data Invalid Flag
E1 Process Error Code
Assumptions: This process must allocate RAM to hold the running average array data.
This process is nearly identical to the Wind Vector Average Process
323
, but with the addition of the
processing required to hold up to 10 minutes worth of running vector wind speed and direction data.
The first 10 data outputs and Data Output #17 of the Running Wind Vector Average Process are
calculated exactly the same way as the Wind Vector Average Process.
324
Data outputs #11 through #16,
and #18 are calculated using circular buffers of data similar to the Running Average Process
325
, but using
vector calculations.
Five circular buffers are maintained, whose values are calculated from the inputted wind speed and wind
direction using the same equations as described in the Wind Vector Average Process
326
:
1. Unit vector x-component wind direction (x
i
).
2. Unit vector y-component wind direction (y
i
).
3. Magnitude vector u-component wind direction (u
i
).
4. Magnitude vector v-component wind direction (v
i
).
5. Scalar wind speed (s
i
).
The sizes of the circular buffers are identical. ZENOSOFT® calculates the size of each circular buffer
(A
size
) from Line Item #8, the Running Average Time and the apparent frequency of how often new data
is received by Line Item #5, the wind direction. Calculating the size of each circular buffer is done using
the same equations as used in the Running Average Process
327
.
The process will validate the calculated data by determining what percentage of the inputted wind speed
and wind direction data is valid using the same technique as described in the Running Average Process
328
.
(Valid data is any data that is not a Bad Sensor Value.)
2.3. Block Average Direction Process
Inputs: 4 Wind Direction data
5 Compass data (optional)
6 The number of averaging blocks (1-10)
7 The number of minutes per block (1- 60)
Outputs: 1 Average wind direction
2 Immediate data (most recent sample)
3 Standard deviation of data over sample interval
E1 Process Error Code
323
Refer to Category #2, Process #1.
324
Ibid.
325
Refer to Category #1, Process #3.
326
Refer to Category #2, Process #1.
327
Refer to Category #1, Process #3.
328
Ibid.
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