RF03 – sensing the low-level clouds with different settings

Today’s flight planning and go or no-go decision have not been easy. The overall situation has been similar to yesterday’s with haze all over Northern Sweden and Finland and the area around Kiruna airport showing a sunny sky with broken low-level clouds only, but with a forecast saying low visibility and difficult landing conditions throughout the day. After long discussions, we decided to go for a short survey, staying local to test different settings for GRaWAC to sense the low-level haze.

Up in the air, we tried different settings with the radars to see which works best with the thin haze. Although the haze was very thin and the ground was visible, both got a signal from time to time. To get an idea of temperature and humidity stratification, two dropsondes have been launched.

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