The survey flights require clear and calm weather.
All the flights are flown VFR (Visual Flight Rules).
In order to keep and maintain a high level of safety and quality,
despite high speed at low altitude, the service is only conducted when
the weather is clear and calm.
Sometimes the wind is to strong wind causing strong turbulence at low altitudes due to the
so-called ground friction. The same applies sunny and warm days when solar radiation is too high, then the rising warm
layers of air causes turbulence. Turbulence is therefore a limiting factor because it causes stress on both the aircraft and the crew. h4>
Visibility is of course also a limiting factor. When the cloud base is to low or then its raining the visibility often become
too poor for safety to be maintained. The best conditions usually appears clear and calm mornings or late afternoons and evenings, when
the wind and solar radiation are moderate.