Fig. 4
From: Passive kHz lidar for the quantification of insect activity and dispersal
Raw- and parameterized insect wing signals Iwing and \(\hat{I}_{\text{wing}}\), shown together with the body signal Ibody obtained with a sliding minimum. The parameterized signal \(\hat{I}_{\text{wing}}\) is constructed from a discrete series of harmonics, the relative strengths and phases of which are obtained by fitting the series onto the raw data and minimizing the residuals of the fit