AN / APG - 76 The AN / APG - 76 radar is a pulse doppler K band multi - mode radar ; manufactured by Northrop Grumman ( Norden Systems ) , and it is a member of a radar family produced by Norden based on the similar design principles and evolution . AN / APQ - 92 . The first radar of the radar family AN / APG - 76 belongs to is AN / APQ - 92 , which equipped A - 6A . AN / APG - 92 is a search and navigational radar , with function called search radar terrain clearance ( SRTC ) to generate a synthetic terrain display on the pilot ' s Vertical Display Indicator ( VDI ) , which is a large cathode ray tube ( CRT ) display in the center of the pilot ' s console , right under the gun sight . The display showed vertical terrain development in a 53 degree x 26 degree window about the projected flight path . If the Intruder was heading for a valley between two hills , the pilot would see return generally in the shape of two hills ( one on either side of the display ) , with a curving " V " notch in the center between them . The limitation of SRTC is in its inability to detect smaller man - made features - like cables suspend across a valley . AN / APQ - 92 is part of DIANE ( Digital Integrated Attack / Navigation Devices ) , which consists of multiple radars : the Norden AN / APQ - 92 search and navigation radar , the separate AN / APQ - 88 for tracking / attacking , AN / APN - 141 radar altimeter , & AN / APN - 122 navigational radar to provide position updates to the AN / ASN - 31 inertial navigation system . < ref name = " APQ - 92 / 112 / 129 / 148 / 156 " > < / ref > AN / APQ - 103 . AN / APQ - 103 is the successor of AN / APQ - 92 , and it is used in conjunction with AN / APN - 153 Doppler navigational radar that replaced earlier AN / APN - 122 , and AN / APQ - 112 radar replaced AN / APQ - 88 . The APQ - 103 / APN - 153 / APQ - 112 upgrade is part of the improvement of DIANE installed on A - 6B . AN / APQ - 112 . AN / APQ - 112 is a tracking radar that replaced earlier AN / APQ - 88 radar developed by Naval Avionics . While the AN / APQ - 88 could only track moving targets , the APQ - 112 could track stationary targets as well , and it had slightly better resolution and greater reliability than AN / APQ - 88 . AN / APQ - 112 not only could perform all functions of AN / APQ - 88 , but was also capable of performing some functions of AN / APQ - 103 . As more advanced version of AN / APQ - 112 was developed , it replaced AN / APQ - 103 . However , the attempt to replace two separate radars failed at the time due to increased mission requirement , and a separate dedicated fire control radar was needed . As a result , a vastly improved Sperry Corporation AN / APQ - 127 was adopted , while AN / APN - 186 navigational radar replacing earlier AN / APN - 153 in earlier A - 6B . APN - 186 / APQ - 112 / APQ - 127 suit is designed as part of A - 6C specially dedicated for night attack missions against the Ho Chi Minh Trail in Vietnam . AN / APQ - 129 . AN / APQ - 129 is a derivative of AN / APQ - 112 for EA - 6A , allowing EA - 6A to fire AGM - 45 Shrike anti - radiation missile ( ARM ) , though this was never done in real combat . AN / APQ - 148 . The J - band AN / APQ - 148 is the first one in the radar family that had achieved the capability to replace two separate radars with a single multi - function radar . AN / APQ - 148 was the original radar on board A - 6E . AN / APQ - 156 . AN / APQ - 156 is the development of AN / APQ - 148 , and it is used in conjunction with Target Recognition and Attack Multi - Sensor " ( TRAM ) system starting to be installed on A - 6E in 1979 during upgrades . The bombardier / navigator could use both TRAM imagery and radar data for extremely accurate attacks , and the radar has an Airborne Moving Target Indicator ( AMTI ) , which allowed the aircraft to track a moving target ( such as a tank or truck ) and drop ordnance on it even though the target was moving . AN / APS - 130 . AN / APS - 130 is a derivative of AN / APQ - 156 and the upgrade of AN / APQ - 129 , by applying the knowledge gained from AN / APQ - 156 to improve AN / APQ - 129 . AN / APS - 130 is fitted on EA - 6B , enable the aircraft to fire AGM - 88 HARM . AN / APS - 146 . AN / APS - 146 is a simplified version of AN / APQ - 156 / APS - 130 , with the interferometer omitted , but added a weather avoidance pencil beam , and replaced the reflector antenna with a planar antenna . AN / APQ - 173 . AN / APQ - 173 is the development of AN / APQ - 156 with the addition to include synthetic aperture radar ( SAR ) . and multi - function cockpit displays – the APQ - 173 would have given the Intruder air - to - air capacity with provision for the AIM - 120 AMRAAM . AN / APQ - 173 was designed for A - 6F / G which were cancelled . AN / APG - 76 is used in F - 4E Phantom II ( Israel ) and has been tested in a pod configuration with the F - 16 and S - 3 Viking Grey Wolf Project . AN / APG - 73 incorporates capability of AN / APQ - 173 such as being compatible with AGM - 88 and AIM - 120 , and it can also be configured as a side - looking radar . The side - looking version of AN / APG - 76 played a very important role in the development of AN / APY - 3 radar for Northrop Grumman E - 8 Joint STARS in providing the foundation of know - hows for the development of the more advanced AN / APY - 3 . AN / APY - 3 provides high - resolution synthetic aperture radar ( SAR ) images with moving target indicator ( MTI ) overlays to enable the operator to pick out targets in the images that were moving above some speed threshold . The SAR - MTI radar can be integrated with an INS or GPS to give the precise locations of targets , with the data relayed to other platforms over JTIDS . AN / APY - 3 . AN / APY - 3 is the radar developed for E - 8 J - STARS . The 24 - foot ( 7 . 3 meters ) long , side - looking planar passive phased array radar is housed in the 27 - foot ( 8 meters ) long , canoe - shaped radome under the forward fuselage of the hosting aircraft . The radar and computer information systems on the E - 8C gather and display detailed battlefield information on ground forces . The information is relayed in near - real time to the ground stations and to other ground command , control , communications , computers and intelligence , or C4I , nodes . The antenna of AN / APY - 3 is tilted to either side of the aircraft where it has a 120 - degree field of view covering nearly 19 , 305 square miles ( 50 , 000 square kilometers ) , and is capable of detecting targets at more than 250 kilometers ( more than 820 , 000 feet ) . The radar also has some limited capability to detect helicopters , rotating antennas and low , slow - moving fixed wing aircraft . A total of 1000 ground targets can be simultaneously tracked by AN / APY - 3 . AN / APY - 6 . The X - band AN / APY - 6 is a derivative of AN / APY - 3 , and it is based on fiber - optic ethernet LAN . The radar has SAR , Inverse synthetic aperture radar ( ISAR ) and ground moving target indication ( GMTI ) modes . The resolution in strip SAR mode is 6 ft , while in SAR and ISAR mode , the best resolution is 1 ft . AN / APY - 6 has a total of four parallel receivers , with one for GMTI , and three for various SAR / ISAR modes . The planar passive phased array antenna can be either point forward or abeam , with coverage of 200 degree arc , and a maximum range of 200 km . AN / APY - 6 is designed for precision target striking , and an AESA version is currently under development . AN / APY - 7 . AN / APY - 7 is the development of AN / APY - 3 , and it is a solid state version of AN / APY - 3 that adopts AESA . AN / APY - 7 radar can operate in fixed target indication ( FTI ) , wide area surveillance , synthetic aperture radar ( SAR ) , target classification and ground moving target indicator ( GMTI ) modes . An antenna is installed on the underside of the aircraft , which can be tilted for a 120 degree to either side of the plane to cover targets at more than 152 miles ( 250 km ) . The 7 . 3 m ( 24 ft ) long , 0 . 6 m ( 2 ft ) wide side - looking AESA antenna s housed in a 12 m ( 40 ft ) canoe - shaped radome under the forward fuselage of the hosting aircraft along the center line . As with AN / APY - 3 , AN / APY - 7 is electronically in azimuth by phase shifters , and mechanically in elevation by two servo motors .