Gps Specifications - Garmin GPS 400W, GNC 420W Installation Manual

1.4.3

GPS Specifications

Number Of Channels
Frequency
Sensitivity (Acquisition, No
Interference)
Sensitivity (Drop Lock)
Dynamic Range
Lat/Lon Position Accuracy
Velocity
TTFF (Time To First Fix)
Reacquisition
Position Update Interval
1 PPS (Pulse Per Second)
Datum
SATCOM Compatibility
Antenna Power Supply
400W Series Installation Manual
190-00356-02
15 (12 GPS and 3 GPS/WAAS/SBAS)
1575.42 MHz L1, C/A code
-134.5 dBm GPS
-135.5 dBm WAAS
-144 dBm
> 20 dB
<1.25 meter RMS horizontal, <2 meter vertical, with WAAS
1000 knots maximum (above 60,000 ft)
1:45 min. typical with current almanac, position, and time
10 seconds typical
0.2 sec (5 Hz)
±275 Nsec of UTC second
WGS-84
SATCOM compatibility is dependent upon antenna
selection. See Section 1.4.8 for additional information.
35 mA typical, 40 mA max at 4.7 VDC
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Rev. E