US: The US Air Force has awarded Lockheed Martin Space Systems of Denver a contract modification worth USD 246 million for the seventh and eighth satellites in the next-generation GPS III positioning, navigation and timing constellation, according to the Pentagon. Work on the seventh and eighth GPS III satellites is expected to be completed in April 2018 and October 2018, respectively. In February, the Defense Department announced it was awarding Lockheed Martin USD 14 million to order long-lead components for the spacecraft. The GPS III satellites are designed to provide more accurate navigation signals that are also more resistant to both intentional and unintentional interference.
The first GPS III satellite has an expected launch readiness date of April 2016, two years later than originally planned, due to a number of issues including difficulties by subcontractor Exelis in developing the main payload.
Source: Space news