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Airborne pathogens or allergens typically enter the body via the nose, throat, sinuses and lungs. Inhalation of these pathogens affects the respiratory system and can then spread to the rest of the body. Sinus congestion, coughing and sore throats are examples of inflammation of the upper respiratory airway.
Airborne early warning systems: Airborne Early Warning and Control ("AWACS" for NATO, many countries have developed their own AEW&C systems) Ground-based early warning radar systems: Ballistic Missile Early Warning System and PAVE PAWS (United States) Duga radar, also known as the "Russian Woodpecker" (Russia) Dnestr radar (1st generation Russian)
An early warning system is a warning system that can be implemented as a chain of information communication systems and comprises sensors, event detection and decision subsystems for early identification of hazards. They work together to forecast and signal disturbances that adversely affect the stability of the physical world, providing time ...
A Royal Air Force Boeing E-3 Sentry over North Yorkshire. An airborne early warning and control (AEW&C) system is an airborne radar early warning system designed to detect aircraft, ships, vehicles, missiles and other incoming projectiles at long ranges, as well as performing command and control of the battlespace in aerial engagements by informing and directing friendly fighter and attack ...
Today the early warning role has been supplanted to a large degree by airborne early warning platforms. [1] By placing the radar on an aircraft, the line-of-sight to the horizon is greatly extended. This allows the radar to use high-frequency signals, offering high resolution, while still offering long range.
Airborne Warning and Control System, or AWACS, may refer to: Airborne early warning and control (AEW&C), a general term for the type of aircraft used in this role Boeing E-3 Sentry , the aircraft developed under the United States Air Force's "Airborne Warning and Control System" program
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In 1963, the USAF asked for proposals for an Airborne Warning and Control System (AWACS) to replace its EC-121 Warning Stars, which had served in the airborne early warning role for over a decade. [3] The new aircraft would take advantage of improvements in radar technology and computer-aided radar data analysis and data reduction.