Started to measure the sonic azimuths with the datascope. Set declination = 0.
Sighting along PAM masts, the orientation of the upwind array is 39.6 deg and the downwind array is 39.2 deg. Adding 270 degrees and the declination (13.7 deg) gives 322.9 deg true, which is close to the design value of 325 deg
Tables list three independent measurements of sonic azimuth. I measured each row at different times, requiring independent estimates of proper alignment of datascope relative to sonic, which is the biggest source of uncertainty.
Upwind Array
sonic |
3u |
4u |
5u |
6u |
7u |
8u |
9u |
10u |
11u |
|---|---|---|---|---|---|---|---|---|---|
|
133.6 |
136.5 |
133.3 |
134.3 |
135.3 |
NA |
133.9 |
134.9 |
133.1 |
|
133.4 |
135.8 |
132.3 |
134.4 |
134.8 |
132.4 |
133.2 |
134.0 |
133.7 |
|
133.0 |
135.4 |
132.1 |
134.4 |
134.7 |
134.0 |
131.8 |
132.8 |
132.3 |
Profile tower
sonic |
1.5m |
3m |
4m |
5.5m |
7m |
8m |
|---|---|---|---|---|---|---|
|
132.4 |
135.8 |
133.6 |
135.9 |
128.8 |
131.2 |
|
132.9 |
136.7 |
133.4 |
134.0 |
130.7 |
133.0 |
|
132.2 |
136.3 |
133.8 |
133.1 |
130.3 |
132.0 |
Downwind Array, top
sonic |
3t |
4t |
5t |
6t |
7t |
8t |
9t |
10t |
11t |
|---|---|---|---|---|---|---|---|---|---|
|
136.1 |
136.1 |
138.9 |
134.5 |
134.7 |
135.1 |
135.7 |
135.7 |
140.9 |
|
135.9 |
135.3 |
139.1 |
134.1 |
134.6 |
134.9 |
135.3 |
135.9 |
140.7 |
|
135.8 |
135.9 |
138.8 |
134.0 |
135.1 |
134.9 |
135.6 |
135.5 |
140.6 |
use |
135.9 |
135.8 |
138.9 |
134.2 |
134.8 |
135.0 |
135.5 |
135.7 |
140.7 |
Downwind Array, bottom
sonic |
1b |
2b |
3b |
4b |
5b |
6b |
7b |
8b |
9b |
10b |
11b |
12B |
13B |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
136.3 |
131.8 |
134.3 |
133.8 |
136.3 |
130.9 |
134.5 |
135.8 |
134.4 |
134.5 |
138.5 |
136.8 |
137.0 |
|
136.3 |
130.8 |
134.4 |
134.1 |
136.0 |
131.8 |
134.0 |
136.3 |
135.2 |
135.1 |
138.6 |
136.6 |
136.7 |
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