The Defense Science Board Task Force was formed to address questions related to the development of X-band, active electronically steered arrays (AESAs) for airborne platforms. Areas focused on were advanced radar capabilities for ground targets and air targets. The airborne radar inventory can be divided into three broad categories: (1) Air target surveillance and cueing radars mounted in rotodomes (e.g., AWACS, E-2O). (2) Nose-mounted fighter radars for air and ground targets (e.g., F-i 5, F-i 6, F-22, JSF). (3) Side-looking radars for ground reconnaissance, surveillance, and cueing (e.g., U-2, JSTARS, Global Hawk). Categories (2) and (3) are dominated by X-band radars; the insertion of AESA technology into category (3) was the primary subject for this task force.