6.1.5.5 GAIN PLUS (Rockwell Collins) 6-20
6.1.6 Reactive Wind Shear Indications 6-23
6.1.7 Weather Radar Indications 6-23
6.1.7.1 Weather Radar Messages 6-25
6.1.7.2 Wind Shear Indications 6-25
6.1.8 Weather Radar Controls 6-26
6.2 Operational Recommendations for Weather Radar 6-27
6.2.1 Weather Radar Operations 6-27
6.2.1.1 For the Airline 6-27
6.2.1.2 For the Flight Crew 6-27
6.2.2 Wind Shear 6-28
6.2.2.1 For the Airline 6-28
6.2.2.2 For the Flight Crew 6-28
6.3 Regulations for Weather Radar 6-29
6.4 Manufacturers for Weather Radar 6-31
6.4.1 Honeywell RDR-4B 6-31
6.4.2 Rockwell Collins WXR 701X and WXR 2100 6-31
6.5 Future Systems 6-32
6.5.1 Honeywell RDR 4000 6-32
Turbulence, wind shear, hail, and thunderstorm are identified as the causes of major incidents or accidents, especially during final approach and take-off. The awareness of these meteorological phenomena improves the flight safety thanks to the weather radar.
At the time of writing the brochure, three types of weather radar are available on Airbus aircraft:
- Conventional weather radar: The weather display is synchronized with the movement of the radar antenna.
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Weather radar with an automatic tilt1: It is a radar capable to compute automatically a tilt angle.
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Weather radar using a buffer: The weather information from the radar antenna is stored in a buffer. Weather information only applicable for display is extracted from this buffer. Weather radars that use a buffer are Rockwell Collins Multiscan and the AESS weather radar from Honeywell.
The present chapter describes weather radars available on A300/A310/A320/A330/A340 aircraft. For the Honeywell weather radar of AESS available on A380 aircraft, refer to 7 – Aircraft environment Surveillance.
6.1. DESCRIPTION OF WEATHER RADAR
Thanks to the characteristics of weather radar pulses, the weather radar detects precipitations, wind shears, turbulence and prominent terrains. The weather radar also provides indications and/or alerts to avoid them. It has to be noted that the weather radar detects wet meteorological phenomena only: it means that the weather radar does not detect dry phenomena like Clear Air Turbulence (CAT).
The present chapter provides a basic knowledge about weather radar physics and describes the functions proper to each weather radar type. The description is common to all weather radar types, except when specified. The Appendix G – Aviation meteorology reminders also provides some reminders about
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