These sensors are integrated through a general-purpose computer that enables the E-2C to provide early warning, threat analyses, and control of counter action against air and surface targets. Each E-2C can track, automatically and simultaneously, more than 600 targets and control more than 40 airborne intercepts. The E-2C Hawkeye 2000 is being equipped with the cooperative engagement capability (CEC), greatly extending the battlespace for participants on the network and the ALQ 217 Electronic Support Measures System, which extends the passive detection range.
The APS-145 radar is located in the rotodome atop the aircraft. It rotates at six revolutions per minute and operates in the radio frequency (RF) range from 0.5 to 1 GHz. The Group II upgrade, which is currently under way, provides fully automatic overland targeting and tracking capability, a 40 percent increase in radar and IFF range, improved displays, increased target tracking capacity, Global Positioning System (GPS), Joint Tactical Information Distribution System (JTIDS), and voice satellite communications.
As part of the E-2D Radar Modernization Program, the APS-145 will be replaced with a new, solid-state, electronically steered ultrahigh-frequency (UHF)