What type of tracker is used in the guidance section of the AGM-88?

The AGM-88 HARM (High-speed Anti-Radiation Missile) utilizes a Passive Broadband RF tracker in its guidance section. This type of tracker is designed to home in on electromagnetic emissions produced by enemy radar systems. It can detect and classify a wide range of frequencies, allowing the missile to accurately target and engage radars and other electronic systems that are active at the time of launch.

The use of a passive tracking system enhances the missile's stealth since it does not emit signals that can be detected by enemy radar, enabling it to operate effectively in contested environments. This characteristic is critical for the success of the HARM missile, which is aimed at suppressing enemy radar and air defense systems by targeting their electronic emissions.

Other tracking methods, such as Active Infrared, Laser-guided, and GPS-guided systems, serve different purposes and are not applicable in the case of the AGM-88 for its intended anti-radiation mission. Active Infrared relies on heat signatures, Laser-guided requires a designated target illuminated by a laser, and GPS-guided systems depend on satellite navigation, none of which align with the primary function of the AGM-88's guidance system.