Weather Radar System

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Write a brief description of how a particular aircrafts Weather Radar system operates?
In the following assignment a Boeing weather radar system will be analysed. The history of weather radars will also be looked into along with all of the parts connected to the system, the interface used, data these interface normally carry on the aircraft and the methods used for testing and checking the system.
Weather radar has a very important role on any aircraft. It allows the detection and display of any severe conditions or interferences within up to a 20 nautical mile space in front of the aircraft. Also known as WXR it allows the pilot sufficient time to avoid theses severe areas which may disturb flight by using their
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It is held within the radar sensor. It uses the antenna to pick up the return signals and transmit the radar energy into a directional beam to the radar sensor. A duplexer in the radar transceiver switches the antenna to receive for about 2500 microsecond after a pulse is transmitted to receive and process any returns. The cycle repeats and the receiver circuitry builds a two dimensional image of the obstruction for the aircraft display.
(Aviation maintenance technical handbook-Airframe volume 2, By the US Department of transportation/ Federal aviation authority)
There are two main types of antenna Parabolic and Flat plate.
The older antenna used is the Parabolic antenna. The radio frequency power used by this system is 65kW and it is supplied via wave guide and feeder to a parabolic reflector where a narrow beam is directed into the space. The spoiler deflects the radio waves to the ground for ground mapping. Higher powers are associated with this antenna
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It has gone on since its first use to have many changes made such as the addition of colour for severity and the increased accuracy by the flat plate system. If the aircraft industry never came up with weather radar systems there is no way aircraft could have developed the way they have. It gives the pilot and crew massive insight to any obstruction that may be in their flight path and allows them to avoid these and also allows them to land in poor weather by combining it with the GPWS (ground proximity

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