Open Access
Table 1
Independent parameters included in the analysis of amplitude fluctuations. Mean values are averages of the time frame from 10 s prior to 10 s after the moment of shortest distance between microphone and aircraft.
| T2m (K) | Mean temperature at 2 m height |
| Tsurf (K) | Earth surface temperature |
 (m/s) |
Friction velocity |
| QH (W/m2) | Surface sensible heat flux |
| zi (m) | Boundary layer height |
| u100m (m/s) | Wind at 100 m height |
| Lavg (m) | Mean distance between airplane and microphone |
| hs (m) | (Mean) sound source height |
| LABL (m) | Propagation path within ABL, part of Lavg within ABL |
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