Under the contract, Northrop Grumman will enhance the system's multi-radar tracker and data communications unit and sustain and upgrade the software and hardware of the command and control systems that support the tactical air operations center and circuit card assemblies. "As the original equipment manufacturer of the AN/TYQ-23, Northrop Grumman has supported changing needs in the command and control arena for more than 40 years," said Ike Song, Northrop Grumman Electronic Systems vice president Of situational awareness systems. The tactical operations center is a transportable command, control and communications facility that works with the sector anti-air warfare facility and peripheral equipment for surveillance, identification, threat evaluation, weapons coordination, airspace management and communications capabilities.