The aerospace giant is already building the first three satellites in the IIF series, the first of which is slated to launch in mid 2006, and it has options to build up to twelve.

The deal gives Boeing's satellite unit the green light to begin production of satellites numbers four through six in the series, and the production of long-lead components for IIF satellites seven through nine.

The satellites, which provide the military with weapons guidance information, are designed with enhanced anti-jamming capabilities, increased accuracy, and higher securitys.

The GPS program is managed by a joint program office at the US Air Force's Space and Missile Systems Center, Los Angeles Air Force Base, California, and by Boeing Air Force Systems, Long Beach, California., a business unit of Boeing Integrated Defense Systems.

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