In 1994, the USAF asked Lockheed Martin to develop an air to surface capability
for the F-22. Provisions were later made to the lower weapons bays to
accommodate one 1,000 pound GBU-30/32 Joint Direct Attack Munition (JDAM)
per side. A simple GPS (Global Positioning System)/inertial system will guide the
weapon to its target. Eventually later versions will have increased precision attack
capability by including a programmable radar seeker. The F-22's air-to-surface
operations will be carried out courtesy of its onboard synthetic aperture radar (SAR) mode.