What type of radar is equipped on an F-16?

The F-16 is equipped with the APG-68 radar system, which is a multi-mode radar that provides air-to-air and air-to-ground capabilities. This radar has been optimized for various combat scenarios, allowing the F-16 to effectively detect and track both aerial and ground targets. The APG-68 employs a synthetic aperture radar function that enhances ground mapping capabilities, making it suitable for precision strikes and situational awareness in combat.

In contrast, the other radar systems listed serve different aircraft or configurations. The APG-77 is primarily used on the F-22 Raptor and is known for its advanced stealth characteristics and capabilities, while the AN/APG-63 radar is associated with the F-15 family of aircraft. The AN/APG-81 radar system is designed for the F-35 and features advanced capabilities such as electronic warfare and networked operations, which are tailored to the requirements of fifth-generation fighters. Thus, the APG-68 is specifically designed for the F-16 and its operational needs, making it the correct choice for the question.