AN/APY-2

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The AN/APY-2 is a pulse-Doppler radar system developed by Northrop Grumman (formerly Westinghouse) for the E-3 Sentry Airborne Warning and Control System (AWACS) aircraft. It is a variant of the AN/APY-1 radar and includes maritime surveillance capabilities. Here's a breakdown of its key features and capabilities:
Key Features:

• Pulse-Doppler Radar: This allows the AN/APY-2 to accurately determine the velocity of tracked targets and to distinguish between moving targets and ground or sea clutter, which can obscure targets for other radar systems.
• Maritime Surveillance: Unlike the AN/APY-1, the AN/APY-2 has enhanced capabilities for detecting and tracking targets over water.
• 360-Degree View: The radar provides a complete 360-degree view around the aircraft.
• Long Range: At operating altitudes, it can detect targets more than 320 kilometers (200 miles) away, and potentially out to 300 nautical miles (556 km).
• Tracks Numerous Targets: The system can track a large number of targets simultaneously, with reports indicating a capacity for tracking over 600 low-flying targets.
• Operating Band: It is operating in S-band (IEEE designation) or in the E-band (NATO designation).
• Physical Characteristics: The radar antenna is housed in a distinctive rotating dome (rotodome) mounted above the fuselage of the E-3 aircraft. This rotodome is 30 feet (9.14 meters) in diameter and 6 feet (1.83 meters) thick.

• The AN/APY-2 radar, as part of the AWACS system, provides surveillance from the Earth's surface up into the stratosphere.
• It can detect and track both airborne and maritime targets.
• The radar system can differentiate targets from ground and sea clutter.
• Data collected by the radar can be relayed in real-time to command and control centers on the ground or aboard ships.
• The data is displayed on 14 consoles.

• Development began in January 1973 and was completed in September 1994.
• The Radar System Improvement Program (RSIP) enhanced the radar's performance against small airborne targets, improved its electronic counter-countermeasures (ECCM) capabilities, and increased its reliability and maintainability.

• Onboard the E-3 Sentry, the AN/APY-2 is a crucial component of the aircraft's surveillance and battle management capabilities.
• The tactical director and specialized crew members use data from the AN/APY-2 and other sensors to carry out the following: reconnaissance, create situation awareness, weapons control and air fight management, and communications.