Falls es wen interessiert, die LOI von EASA bzgl. IR und AWR
Principles
List the two main tasks of the weather radar in respect of weather and navigation
Explain how the antenna is attitude-stabilised in relation to the horizontal plane using the aircraft's attitude reference system
Describe the cone shaped pencil beam of about 3° to 5° beam width used for weather depiction
Explain that in modern AWRs a single radiation pattern is used for both mapping and weather with the
scanning angle being changed between them
Presentation and interpretation
Explain the functions of the following different modes on the radar control panel
— Off/on switch
— Function switch, with modes WX, WX+T and MAP. — Gain control setting (auto/manual)
— Tilt/auto tilt switch.
Name, for areas of differing reflection intensity, the colour gradations (green, yellow, red and magent indicating the increasing intensity of precipitation
Illustrate the use of azimuth marker lines and range lines in respect of the relative bearing and the distance a thunderstorm or to a landmark on the screen
Coverage and Range
Explain how the radar is used for weather detection and for mapping (range, tilt and gain if available)
Errors, accuracy, limitations
Explain why AWR should be used with extreme caution when on the ground
Factors affecting range and accuracy
Explain the danger of the area behind heavy rain (shadow area) where no radar waves will penetrate
Explain why the tilt setting should be higher when the aircraft descends to a lower altitude
Explain why the tilt setting should be lower when the aircraft climbs to a higher altitude
Explain why a thunderstorm may not be detected when the tilt is set too high
Application for navigation
Explain how turbulence (not CAT) can be detected by a modern weather ra
Describe the navigation function of the radar in the mapping mode
Describe the use of the weather radar to avoid a thunderstorm (Cb)
Explain how wind shear can be detected by a modern weather radar
