Fig. 10
From: Passive kHz lidar for the quantification of insect activity and dispersal
Histograms of the east–west and up–down time delays, τew and τud. The east–west distribution is bimodal, indicating that the observed insects transit the probe volume laterally, whereas the up–down distribution is single-modal and centered around 0 ms, indicating that vertical movement is limited. Throughout the study period, the wind was mostly blowing westward, with an average wind speed of 1.6 m/s