AN/APG-77
Country of originUnited States
ManufacturerWestinghouse (acquired by Northrop Grumman), Texas Instruments (acquired by Raytheon)
TypeSolid-state active electronically scanned array (AESA)
Azimuth120°
Power20 kW peak[1]
AN/APG-77 in the National Electronics Museum

The AN/APG-77 is a multifunction low probability of intercept radar installed on the F-22 Raptor fighter aircraft. The radar was designed and initially built by Westinghouse and Texas Instruments, and production continued with their respective successors Northrop Grumman and Raytheon after acquisition.

It is a solid-state, active electronically scanned array (AESA) radar. Composed of 1956 transmit/receive modules,[2] each about the size of a gum stick, it can perform a near-instantaneous beam steering (in the order of tens of nanoseconds).

The APG-77 was highly appreciated by pilots transitioning from F-15s upon the F-22's introduction in 2005, providing a massive boost in situational awareness. The APG-77 has an incredibly fast scan time across its 120 degree field of view and could detect aircraft from over 320 mi (515 km) away.[3] The upgraded APG-77(V)1 may have an even greater range.

More than 100 APG-77 AESA radars have been produced to date by Northrop Grumman, and much of the technology developed for the APG-77 is being used in the APG-81 radar for the F-35 Lightning II. The AN/APG-77 system itself exhibits a very low radar cross-section, supporting the F-22's stealthy design.

The APG-77(V)1 was installed on F-22 Raptors from Lot 5 and on.[4] This provided improved air-to-air performance, full air-to-ground functionality (high-resolution synthetic aperture radar mapping, ground moving target indication and track (GMTI/GMTT), automatic cueing and recognition, combat identification, and many other advanced features).[5][4][6]

See also

References

  1. ↑ "Forecast International: Intelligence Center".
  2. ↑ "Future DoD Airborne High-Frequency Radar Needs/Resources" (PDF). Department of Defense. April 2001. p. 19. Archived from the original (PDF) on 2012-09-20.
  3. ↑ Hoffman, Carl (November 2005). "The Raptor Arrives". Air and Space Magazine. Archived from the original on January 22, 2022. Retrieved December 3, 2023.
  4. 1 2 "F-22 Raptor To Get Upgraded Radar". Defense Update. 2 April 2007. Archived from the original on 2016-11-22. Retrieved 2016-11-22.
  5. ↑ "APG-77(V)".
  6. ↑ "Northrop Successfully Completes F-22 Radar Flight-Test Certification". Archived from the original on 2009-08-02. Retrieved 2009-07-17.
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