Fig. 3
From: Cloud trains associated with Martian Mountain Lee Waves on the eastern side of the Phlegra Montes
The schematic view explaining the method for deriving the mean wavelength of the cloud train. The red circles indicate the two edge points of the cloud train that are determined so that the red line passing through them is as perpendicular as possible to the phase lines of the cloud streaks. The yellow circles indicate the most outside cloud streaks that can be visually detected on the red line