How to find the landing period during NAVIGATION_STATE_AUTO_MISSION = 3

When I am in manual mode on the ‘vehicle_status’ ‘nav_state’ can be
therefore I can easily find that time span when the drone was landing, it is needed since I want to run data analytics only during that period.
Is there a way to find the landing period while the NAVIGATION_STATE_AUTO_MISSION = 3?

Many thanks,