Normally we do not use data at wind directions of +/- 45 degrees from 180 (in sonic coordinates), in order to eliminate winds blowing through the tower and into the back of the sonic. However, because of the topography at RIM, I used data at +/- 60 about the nominal axis of the gap, SSW or 202.5 deg. The tilt plots are done with respect to the sonic u axis, which was pointed to 253 degrees. Thus in instrument coordinates, the acceptable data is from -10 deg to 110 deg.
Also at RIM, there is a systematic descent of air into the crater, i.e. a vertical flow normal to the "surface". I find more realistic lean angles by setting w.off = 0 and use the latter results in the RIM cal_files.
sonic |
lean (deg) |
leanaz (deg) |
w offset (cm/s) |
|---|---|---|---|
3m.near |
0.6 |
-3.2 |
-2 |
10m.near |
1.0 |
9.9 |
-2 |
15m.near |
0.5 |
43.2 |
0 |
20m.near |
0.6 |
27.8 |
-1 |
25m.near |
1.0 |
79.1 |
-1 |
30m.near |
0.7 |
38.1 |
-2 |
35m.near |
0.7 |
112.2 |
-2 |
40m.near |
0.6 |
96.2 |
1 |
45m.near |
1.1 |
33.7 |
-1 |
50m.near |
0.8 |
34.0 |
0 |
5m.rim |
1.3 |
-91.2 |
0 |
10m.rim |
2.2 |
-122.7 |
0 |
15m.rim |
1.7 |
-107.5 |
0 |
20m.rim |
1.4 |
-109.7 |
0 |
25m.rim |
1.1 |
-119.2 |
0 |
30m.rim |
1.4 |
-126.2 |
0 |
35m.rim |
1.2 |
-101.4 |
0 |
40m.rim |
2.4 |
-110.8 |
0 |
3m.far |
1.1 |
-31.8 |
-2 |
3m.flr |
0.7 |
162.1 |
-3 |
ssw2.flr |
10.1 |
-59.0 |
3 |
ssw4.flr |
30.5 |
-38.2 |
-5 |