...
There are several statements about the heights of the reference marks in this logbook entry. It is stated that the profile reference mark for configuration 3 = 1.505 m agl, but also that it is 0.027 m "above top of 1.55m sonic" (boom?), implying a height of 1.50m+0.027m = 1.53 m agl. Then it says the reference mark for configuration 4 is 0.040 m above the reference mark for configuration 3, which could be 1.65m, 1.55m or 1.57m agl.
The 1b sonic boom was measured to be 5.37m above the reference mark for configuration 4.
This logbook entry also measures the sonic and SHT heights wrt the 1.55m sonic boom. Note that these heights were not changed between configurations 3 and 4, and are consistent within 1cm of the last column of the preceding table.
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| Sonic 1 | SHT 1 |
| Sonic 2 | SHT 2 |
| Sonic 3 | SHT 3 |
| Sonic 4 | SHT 4 | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
reference ht | 1.52m | 1.52m |
|
| 1.67m | 1.67m |
|
| 1.52m | 1.52m |
|
| 1.56m | 1.56m | |
upwind | 3.74/3.24 | na |
| 3.64 | na |
|
| na |
| 6.98 | na | ||||
top | 4.24 | na |
| 4.64 | na |
| 5.83 | na |
| 7.98 | na | ||||
bottom | 3.24 | na |
| 3.64 | na |
| 4.83 | na |
| 6.98 | na | ||||
8m | 8.05 | 8.01 |
| unch | unch |
|
| 8.04 | 8.01 |
|
| 8.06 | 8.01 | ||
7m | 7.08 | 7.01 |
| unch | unch |
|
| 7.12 * | 7.02 |
|
| 7.13 | 7.02 | ||
5.5m | 5.53 | 5.47 |
|
| 5.71 | 5.73 |
|
| 5.83 | 5.84 |
|
| 5.84 | 5.84 | |
4m | 4.24 | 4.23 |
|
| 4.62 | 4.63 |
|
| 4.89 | 4.88 |
|
| 4.90 | 4.88 | |
3m | 3.30 | 3.26 |
|
| 3.68 | 3.66 |
|
| 3.68 | 3.67 |
|
| 3.69 | 3.67 | |
1.5m | 1.55 | 1.51 |
| unch | unch |
| 1.55 | 1.51 |
|
|
|
|
| 1.55 | 1.51 |
* 7m sonic moved up on Aug 3, 0941
Height changed for profile sensors at start of configuration
The configuration 3 SHT heights were not measured, but copied from configuration 4