Image overlap (along-track) is a function of the data collection rate of the sensor, the size of the image on the ground at the given flight altitude, and the flight speed of the aircraft. The sensor collects 1 image every 1.2 seconds, so the distance the aircraft travels in 1.2 seconds should not exceed 80% of the image’s along-track dimension.
Many flight planning software packages will automatically space your flight legs when given the parameters of the imaging system and the required sidelap. The sidelap for a 2p sensor should be 20% to 30%.
2p Field of view from various altitudes
2p Max flight speeds at various altitudes
2p Imaging system properties