Chenning and Tom finished measuring the array dimensions this morning, July 1, from around 9:30 until 10:20 am.
Downwind sonic heights
Position* |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
reference mark height (m agl) |
1.50 |
1.495 |
1.51 |
1.58 |
1.55 |
1.55 |
1.57 |
1.51 |
1.51 |
1.53 |
1.525 |
1.54 |
1.52 |
top of lower sonic boom (m above ref) |
1.67 |
1.67 |
1.665 |
1.655 |
1.655 |
1.66 |
1.67 |
1.66 |
1.67 |
1.66 |
1.66 |
1.66 |
1.67 |
top of upper sonic boom (m above ref) |
|
|
2.675 |
2.67 |
2.665 |
2.66 |
2.66 |
2.66 |
2.67 |
2.66 |
2.66 |
|
|
*Note positions are numbered from SE to NW
mean downwind reference height = 1.53 m, mean lower sonic height above reference = 1.663+0.05 m (total mean height = 3.24 m)
mean upper sonic height = 2.664+0.05 m (total mean height = 4.24 m)
Upwind sonic heights
Position |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
|---|---|---|---|---|---|---|---|---|---|
reference mark height (m agl) |
1.48 |
1.55 |
1.53 |
1.52 |
1.55 |
1.54 |
1.575 |
1.57 |
1.49 |
top of sonic boom (m above ref) |
2.17 |
2.17 |
2.165 |
2.17 |
2.17 |
2.17 |
2.17 |
2.17 |
2.17 |
mean upwind reference height = 1.534 m; mean sonic height above ref= 2.169+0.05 m (total mean height = 3.75 m)
From 12:17 until 12:55, July 1, Gordon and Tom lowered the upwind sonics by 0.5 m to match the height of the lower downwind array.
Sonic spacing
Position |
1-2 |
2-3 |
3-4 |
4-5 |
5-6 |
6-7 |
7-8 |
8-9 |
9-10 |
10-11 |
11-12 |
12-13 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Downwind (m) |
4.04 |
3.97 |
4.00 |
3.99 |
3.99 |
4.00 |
3.98 |
4.01 |
3.97 |
4.02 |
4.01 |
3.98 |
Upwind (m) |
|
|
3.98 |
4.00 |
4.02 |
3.99 |
3.96 |
4.01 |
4.01 |
3.99 |
|
|
Mean downwind sonic spacing = 3.997 m
Mean upwind sonic spacing = 3.995 m
Array spacing
Position |
3 |
7 |
11 |
|---|---|---|---|
Separation (m) |
16.07 |
16.07 |
16.09 |
Profile tower
Reference height agl = 1.52 m
Sonics are 5 above top of boom; SHT inlets are 37 cm below top of boom
Note that often we could not place sonic and SHT boom mounts at the ideal heights
nominal height |
1.5 |
3 |
4 |
5.5 |
7 |
8 |
|---|---|---|---|---|---|---|
top of sonic boom above ref (m) |
-0.02 |
1.725 |
|
|
|
|
top of SHT boom above ref (m) |
0.355 |
2.105 |
|
|
|
|