PRIMUSr 880 Digital Weather Radar System
DUnder the right conditions, a dangerous thunder bumper can develop in 10 minutes, and can in fact spawn and mature under the radar beam as the aircraft approaches it, as shown in figure 5- 14.
If flying at 400 kt groundspeed, a fast developing thunderstorm that spawns 67 NM in front of the aircraft can be large enough to damage the aircraft by the time it arrives at the storm.
THUNDERSTORM MATURES
AS IT APPROACHES
FREEZING
LEVEL
AD- 35699@
Fast Developing Thunderstorm
Figure 5- 14
DAt low altitude, the tilt should be set as low as possible to get ground returns at the periphery only as shown in figure 5- 15.
CORRECT WRONG
FREEZING
LEVEL
AD- 35700@
Low Altitude Tilt Management
Figure 5- 15
Excess up- tilt should be avoided as it can illuminate weather above the freezing level.
NOTE: The pilot should have freeze level information as a part of the flight planning process.
Radar Facts | A28- 1146- 102- 00 |
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