WGS-4 will be similar to the three Block I satellites Boeing already is building, but will include a radio frequency bypass capability designed to support airborne intelligence, surveillance and reconnaissance platforms requiring additional bandwidth. The RF bypass will support data rates of up to 311 megabits per second. The 13-kilowatt WGS satellites are based on Boeing's 702 models and are designed to provide improved communications support for America's warfighters. WGS-4 is expected to launch in early 2011.

"The procurement of this fourth WGS satellite places us on a solid path to increase the capabilities of the DoD communications constellation," said U.S. Air Force Lt. Col. Adam Mortensen, WGS Block II program manager. "The additional satellite substantially increases the tactical communications capacity in key geographic areas, and will provide a critical capability to support data relay from new unmanned aerial vehicles that are coming on line."

WGS will augment and eventually replace the Defense Satellite Communication System (DSCS) currently in orbit. One WGS satellite will provide more throughput than the entire DSCS constellation, which translates to improved effectiveness of worldwide forces and ultimately saves lives. The first WGS Block I satellite is scheduled for launch in mid-2007.

"We are very pleased that the government has exercised this contract option, which will substantially enhance the capability of the WGS constellation," said Charles Toups, vice president of Boeing Navigation and Communication Systems. "Boeing has leveraged a wealth of experience and capability for WGS, including extensive investments in the 702 satellite bus, digital signal processors and phased array antennas. These capabilities enable the tremendous capacity and operational flexibility our nation requires."

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