Weather Radar Flashcards
Main difference between CEO and NEO WX Radar
NEO has weather hazard prediction function
TURB P/B
In normal operation, the TURB function is active (TURB p/b light is on).
The flight crew can remove the turbulence display from the ND (for de-cluttering purpose) by pressing the TURB p/b (TURB p/b light is off).
Turbulence areas are displayed in magenta (within 60 NM)
HZD P/B
The flight crew can display on the ND the Hail & Lightning icons.
In normal operation, the HZD function is active (HZD p/b light is on).
The flight-crew can remove the HZD icons from the ND (for de-cluttering purpose) by pressing the HZD p/b (HZD p/b light is off).
The Lightning and Hail icons generally appear on red weather but may appear also on green/yellow
weather, indicating a building convective threat. Each icon is located at the center of the threat area.
Note:
The size of Lightning and Hail icons depends on the Range selected on the ND.
Lightning and Hail icons are not available when the MAP mode is selected on the DISPLAY
mode selector.
WEATHER AHEAD PREDICTION FUNCTION
The weather ahead function improves awareness of potential weather or turbulence hazard.
The weather ahead function:
‐ Detects weather or turbulence hazard 3 min ahead of the aircraft
‐ Triggers crew awareness: an amber WEATHER AHEAD message is displayed at the bottom of
both NDs.
The weather ahead function is available when the weather radar is on.
The weather ahead function triggers crew awareness, in the case of:
‐ Red or yellow weather in the detection area, or
‐ Turbulence in the detection area.
The detection area is:
‐ 3 min ahead of the aircraft
‐ In a corridor of 2 NM on each side of the current track
‐ In a corridor of 4 000 ft above and below the current track.
WEATHER AHEAD message on both NDs
When triggering conditions are satisfied:
‐ Below 1 500 ft, the WEATHER AHEAD message and the aural message are inhibited
‐ Above 1 500 ft, the WEATHER AHEAD message is displayed on both NDs
‐ Above 2 500 ft, an additional “WEATHER AHEAD” aural message is emitted, if the flight crew has
not selected a background weather radar on at least one ND.
When the message appears, the flight crew should set appropriate display mode and ND range to
visualize the detected weather.
WEATHER HAZARD PREDICTION FUNCTION INDICATION ON ND
The Weather, Turbulence and Hazard mode enables the flight crew to have the following information
displayed on the ND:
‐ The weather returns that appear in different colors, depending on the precipitation rates (black,
green, yellow or red)
‐ The turbulence areas in magenta (within 60 NM)
‐ The weather hazard predictions computed by the weather radar.
For the weather hazard predictions:
‐ The weather radar computes an automatic threat assessment of the lightning, hail and convective
activity in a storm cell and in the area near the storm cell. This is represented by Lightning and Hail
icons in addition to the basic reflectivity colors
‐ The weather radar is also able to detect areas of severe signal attenuation with the Rain Echo
Attenuation Compensation Technique (REACT).
Rain Echo Attenuation Compensation Technique (REACT)
REACT function indicates areas where the ability of the radar system to evaluate the weather is
reduced due to severe signal attenuation.
Areas of severe attenuation are indicated in distinct pattern on top of basic weather reflectivity
by magenta concentric arcs.
The REACT function is available even if the HZD function is deactivated (except in MAP
mode)
Predictive Lightning icon
The Lightning icon is displayed on the ND when the weather radar detects an area with high probability of containing this hazard.
The symbol used for the Lightning icon is based on the intuitive indication for lighting.
The Lightning icon can only be displayed when the HZD function is activated.
Predictive Hail icon
The Hail icon is displayed on the ND when the weather radar detects an area with high probability of containing this hazard.
The symbol used for the Hail icon is the ICAO standard symbol.
This Hail icon can only be displayed when the HZD function is activated
