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Penetration of the alert envelope generates an aural “TOO LOW TERRAIN” and an amber GND PROX is displayed on the PFD. The aural alert is repeated twice and again thereafter if the radio altitude value decreases by more than 20% from the altitude at which the initial warning was issued. The amber GND PROX remains displayed until the airplane exits the alert envelope.
700
RUNWAY
Sep 13/2004 Flight Crew Operating Manual Volume 2 REV 1 CSP 100-6
17-01-29
NAVIGATION
TERRAIN AWARENESS WARNING SYSTEM (TAWS) (Cont) ANNUNCIATIONS
All terrain annunciations are displayed on the PFD and MFD.
PFD Display Indicating Terrain Data
3
1.
SOLID RED — Areas of terrain that satisfy the terrain warning alert criteria.
2.
SOLID AMBER— Areas of terrain that satisfy the terrain caution alert criteria.
3.
GREEN, AMBER, RED DOT PATTERN — Areas of terrain that are significantly close to the aircraft but do not satisfy warning alert or caution alert criteria.
Volume 2 Flight Crew Operating Manual Sep 13/2004 CSP 100-6 REV 1
17-01-30
DESCRIPTION
The weather radar is an X-band color weather radar system used for atmospheric moisture detection and ground mapping. The weather radar provides displays of radar-detectable precipitation with in ±60° of the flight path at a selectable range up to 300 nautical miles. The weather radar also provides ground mapping and incorporates features such as autotilt, ground clutter suppression, range compensation and path attenuation correction.
The system consists of a receiver transmitter antenna (RTA) and dual controllers. Radar information is normally displayed on the multifunction display (MFD) in a MAP mode. The AHRS provides stabilization input to the RTA.
In the weather detection mode, storm intensity levels are displayed in four bright colors, contrasted against a deep black background. Areas of very heavy rainfall are displayed in magenta, heavy rainfall in red, less severe rainfall in amber, mod-erate rainfall in green, and little or no rainfall in black (background). Areas of detected turbulence are displayed in magenta.
Range marks and identifying numerics, displayed in contrasting colors, are used to evaluate the location of storm cells rel-ative to the aircraft.
The ground mapping (GMAP) function is used to improve resolution and identification of small ground targets at short ranges. The reflected signals from ground surfaces are displayed as green, yellow, red, or magenta (most to least reflective).
COMPONENTS AND OPERATION WEATHER RADAR OPERATIONAL MODES
The basic weather radar operational modes can be categorized as follows:
RADAR CONTROL MENU
Weather radar functions are controlled on the radar menu. The radar menu can be displayed on the PFD by pressing the RADAR button on the display control panel. Selection of the radar display is accomplished by pressing the TR/WX button on the display control panel. Range and tilt are controlled by the respective knobs on the display control panel.
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