Initial Operational Capability (IOC):
Also Known As: AN/APG-77(V)1 and AN/APG-77(V)4
Origin: United States of America
Parent System: AN/APG-77
Initial Operational Capability (IOC): 2005
Total Production: 203
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Description: The AN/APG-77 is an active electronically-scanned array (AESA) radar designed for the F/A-22 Raptor fighter aircraft. It features separate transmitter and receiver for each of the antenna's radiating elements to provide the agility, low radar cross section (RCS) and wide bandwidth requested for the F/A-22. The APG-77 is more reliable, easy to repair, and maintainable than previously fielded fighter aircraft radars through the use of solid state technology and elimination of mechanical moving parts. Originally, the APG-77 was designed to carry out only air-to-air engagements but emerging threats, US military transformation and latest weaponry have made desirable the F/A-22 to assume strike missions.
The fourth generation variant of AN/APG-77 electronically scanned array radar system features reduced production and maintenance costs compared to third-generation variant. The APG-77 new design has been previously implemented successfully in the APG-80 (F-16E/F) and APG-81 (F-35) radars. The AN/APG-77(V)4 radar requires fewer parts than previous variants and its production line relies on a greater degree of automation. A new software being developed by Northrop-Grumman will enable high-resolution mapping of ground targets. This will permit all-weather precision strikes. According to Northrop-Grumman estimates, the Pentagon would order 203 fourth-generation APG-77s including retrofit kits for third-generation APG-77 radars already delivered and in service on operational F/A-22s.
On 25 May 2005, Northrop-Grumman delivered the next-generation APG-77 named the AN/APG-77(V)1 AESA (Active Electronically Scanned Array) fire control radar. This radar set was scheduled for testing in the summer 2005 at Edwards Air Force Base, California. APG-77(V)1 variant, fitted with a new software suite, introduces air-to-ground capability compared with previous models. The (V)1 model production was cheaper thanks to rely on a highly automated production line. The new software suite related to the (V)1 is expected to enable electronic warfare, attack of fixed and stationary targets on the ground and in all-weather day/night conditions. The new radar variant also captured some advances made in AESA design for the F-35 (APG-81) and Block 60 F-16E/F (APG-80). The APG-77(V)1 successfully completed flight-test certification March 2007.
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