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Block II & IIA Sustainment In the 21st Century

The current GPS constellation has more than 116 cumulative years of outstanding on-orbit performance

• Broadcast L-band signal exceeds specifications by 2-3dB
• Clock accurate to 1 second every 300,000 years
• Clock drift maintained to less than 10 nanoseconds per year

Navigational accuracy

• <100-m URE SPS (C/A)
• <6-m URE PPS (P)