User's Manual

GPS 18 Technical Specifications (190-00307-00) Rev. D
Page 6
1.5.2.4
GPS Receiver Sensitivity
-165 dBW minimum
1.5.3 Environmental Characteristics
• Operating Temperature: -30°C to +80°C
• Storage Temperature: -40°C to +90°C
1.5.4 GPS Performance
1.5.4.1 Receiver
WAAS enabled; 12 parallel channel GPS receiver continuously tracks and uses up to 12 satellites (up to 11
with Measurement Pulse Output active) to compute and update your position.
1.5.4.2 Acquisition Times
• Reacquisition: Less than 2 seconds
• Warm: Approx. 15 seconds (all data known)
• Cold: Approx. 45 seconds (initial position, time, and almanac known; ephemeris unknown)
• AutoLocate
TM
: 5 minutes (almanac known; initial position and time unknown)
• SkySearch: 5 minutes (no data known)
1.5.4.3 Update Rate
• GPS 18 USB, PC, and LVC: 1 record per second
• GPS 18-5Hz: 5 records per second
1.5.4.4 Accuracy
• GPS Standard Positioning Service (SPS)
Position: < 15 meters, 95% typical
Velocity: 0.1 knot RMS steady state
• WAAS
Position: < 3 meters, 95% typical
Velocity: 0.1 knot RMS steady state
• Measurement Pulse Output Time: ±1 microsecond at rising edge of the pulse
• Dynamics: 999 knots velocity (only limited at altitude greater than 60,000 feet), 6g dynamics