AGM -78 “标准” 反辐射导弹是美国通用动力公司于
导引头的频带更宽，并增加了目标位置和频率记忆功能。即使目标雷达关机，该弹仍能按照关机前记忆的目标位置继续飞行，一旦目标雷达重新开机，它便可再次捕捉目标。AGM- 78“标准”反辐射导弹长 4.57米，弹径 0.343米，翼展 1.09米， 发射重量635千克。其动力装置为一台双推力固体火箭发动机，最大射程达56千米，最大速度 M数2.5， 战斗部为烈性炸药预制破片杀伤战斗部，威力比“百舌鸟”大一倍，对雷达的有效破坏半径为 25～30米。
AGM-78 Standard ARM
Developed originally for the U.S. Navy, the AGM-78 was used extensively by the USAF
during the Vietnam War to destroy North Vietnamese radars that controlled
antiaircraft guns and missiles. Launched from F-4G or F-105G "Wild Weasel" aircraft
outside the range of enemy radar defense, the missile guided on the radar energy
emitted by the target. Production began in 1968 with a view to providing an
improvement in the capability then existing with the AGM-45 Shrike. In fact, the
first Standard ARMs were equipped with the passive homing, target seeking head of the
Shrike antiradiation missile (ARM).
Successive improvements led to three more models, with better seekers, electronic
counter-countermeasures, and increased range. About 700 were built when production
ceased in 1978. Some versions not only detonated a warhead for destructive purposes,
but also marked the spot with red or white phosphorus smoke. The F-105G carried up to
two, each on a specially designed LAU-78 launcher; the F-4G carried up to 4 missiles.
In both aircraft, the target identification and acquisition systems aided both the
pilot and the missile in accomplishing the mission.