GPS 2F's specifications

Prime contractor Boeing
Mass at launch 1630 kg
Dry mass  
Dimension 2.5 m high
Solar array 18 m span
DC power  
Design lifetime  

The Block IIF satellites carry the L1M and L2M military GPS channels, the L2C civilian channel and a new L5 civilian channel as well as a nuclear explosion detection system and the a classified instrument. IIF features higher accuracy, enhanced internal clocks, longer life and reprogrammable onboard processors.

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