ICAO Journal

No. 3

A fourth colour, magenta, has been introduced by Bendix Corp. into its RDR-1150 weather radar system to reveal severe storm areas within a contouring cell. Four levels of rain-rate discrimination are now employed — the traditional green, yellow and red plus magenta (set within the red) to show higher orders of rainfall rate. By helping the pilot to understand better the dynamics of severe weather conditions, he will be in a better position to make faster, safer storm-avoidance decisions. Another new feature is "weather attenuation compensation," which increases receiver detection sensitivity. Eight range presentations can be made from 5-320 NM (9-593 km).