GPS World, September 2011
DEFENSE Warfighter TABLE 1 Current Research Clocks Key Parameters Units Conservative Aggressive Gyroscopes Angle rate bias º hour 03 001 stability 1σ Drift rate stability º hour 1 01 Scale factor 1σ ppm 100 1 Range of operation º sec 1440 15000 Power consumption mW 50 5 Accelerometers Acceleration bias μ 130 1 stability 1σ Scale factor 1σ ppm 130 100 Inertial measurement units Navigation error CEP nmi hour 5 1 power consumption W 025 02 Chip scale clocks Time loss at 1 min ns 10 1 Time loss at 1 hour ns 50 12 Time loss at 1 day ns 100 5 Time loss at 1 month ns 1000 30 Frequency retrace 10 11 10 13 Environmental characteristics Performance through shock g 1000 1000 Survive shock g 10000 20000 TABLE 1 Projected performance of chip scale inertial sensors and clocks by 2015 GPS World September 2011 www gpsworld com 46
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