Norman Friedman의 World Naval Weapons Systems 1991-1992의 A-6 공격기의 DIANE에 대한 설명에 나온 얘기입니다.
AGM-45 Shrike의 탐색기가 레이다 전파를 잡으면 그 방향을 기록하고, 멀리 빙 돌아서 다시 그 쪽을 봤을 때 AGM-45 Shrike의 탐색기가 레이다 전파를 또 잡으면 그 방향을 기록해 그 두 선을 쭉 이어 삼각측정을 하고, 그 위치를 향해 AGM-45를 위로 쏴서 사거리를 늘렸다고 합니다.
The computer was particularly useful in Shrike (ARM) delivery. Without a computer, an airplane pointed Shrike at the target radar after the missile seeker locked on. However, the computer made indirect attacks possible. Shrike could acquire (but not lock onto) a radar 40 NM away. Because the seeker had a narrow field of view, such acquisition indicated that the target was dead ahead, within a narrow cone. DIANE could store this indication as a datum. Once the datum had been entered, the pilot could make a long, slow turn to a different position, then again point at the emitter for another bearing; DIANE could triangulate since it continuously kept track of the airplane's position. Using that information, it could compute the appropriate airplane path to loft Shrike toward the target, the missile's seeker acquiring the target as it approached. The missile seeker had a large enough footprint to make up for the inaccuracy inherent in such an attack. The missile gained considerably in range. This approach was later applied to the AGM-78 (Standard ARM) missile under the designation passive angle tracking (PAT/ARM: 6 aircraft were modified). Six aircraft were fitted in 1970 with the APS-118 target identification and acquisition system (TIAS), in effect an extension of PAT/ARM. Although these particular systems are no longer in service, the tactical ideas they represent remain in the A-6E software. About 1980, 12 A-6Es were fitted with AWG-21, which could control Standard ARM missiles. Many aircraft now carry HARMs.
