Foxtech SurePulse VS User Manual page 17

The altitude in overlap rate mode must be consistent with the altitude of
the UAV when it executes the route, referring to the altitude relative to the UAV
takeoff point, not altitude above sea level.
In order to avoid the camera triggering to generate redundant image data
during the drone's ascent or descending process, the camera will stop
triggering when it is lower than the "set flight altitude (meters) minus 50
meters" condition. Please pay attention to the flight settings in the WEB.
The altitude matches the actual flying altitude, otherwise the camera may
not take pictures.
MS600V2 Universal Multi-Spectral
Camera User's Manual
Warning
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