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7.5 Technical parameters of GPS
GPS specifications
Antenna
Protocols
Frequency
Sensitivity
Acquisition time
Accuracy
Tracking sensitivity is the lowest GPS signal level for which the device can still detect an
in-view satellite 98 % of the time when in sequential tracking mode.
Acquisition sensitivity is the lowest GPS signal level for which the device can still detect an
in-view satellite 50 % of the time.
SMA 50
– active
NMEA 0183 v3.0
1575.42 MHz
Tracking: -161 dBm
Acquisition (Assisted): -158 dBm
Acquisition (Standalone): -145 dBm
Hot start: 1 s
Warm start: 29 s
Cold start: 32 s
Horizontal: < 2m (50 %); < 5 m (90 %)
Altitude: < 4 m (50 %); < 8 m (90 %)
Velocity: < 0.2 mps
Table 23: Technical parameters of GPS
35
SmartMotion ST355
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