GPS IIF (Global Positioning System)
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)
