... : L1, 1575.42 MHz Position Accuracy: 10 meters, 2D RMS Velocity Accuracy: 0.1 m/s Hot start: 1 sec. Average ... ., average Altitude Limit: 18,000 meters (60,000 feet) max Velocity Limit: 515 meters/second (1000 knots) max Acceleration Limit: Less ... location to 10meters Also provides GPS speed data for object velocity. Works at an altitude of 18,000 meters (60,000 ...