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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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The 3m profile sensors were not moved through configurations 2-4, so that a discrepancy remains between the heights of the 3m profile sensors during configuration 2 (sonic:=3.77m and SHT=3.75m) and those for configurations 3 and 4 (sonic=3.69m and SHT=3.67m). This implies that the reference mark height for configuration 2, measured at the NE horizontal array tower to be 1.76m, did not apply at the profile tower, but should rather have been 1.68m. (Note that simple transposing the last two digits of 1.76m gives 1.67m, which is within 1 cm of the implied value.) Kurt very carefully kept the baseplates of the 6 towers for the horizontal array at the same elevation using a 4' carpenters level and presumably did the same for the profile tower. It seems unlikely that there was an 8 cm difference between the elevations of the 7 AHATS Roan towers. Assuming 1.67m for the height of the reference mark for configuration 2 gives the following heights:
| 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 |
unch: Profile heights not measured for configuration 2, but same as configuration 1
Height changed for profile sensors at start of configuration
* 7m sonic moved up on Aug 3 at 09:41
** The configuration 3 SHT heights were not measured, but copied from configuration 4