190-01004-02
GTN 625/635/650 TSO Installation Manual
Rev. F
Page 1-5
1.3.4 GTN GPS/SBAS Specifications
Characteristics
Specifications
Number Of Channels
15 (12 GPS and 3 GPS/WAAS/SBAS)
Frequency
1575.42 MHz L1, C/A code
Sensitivity (Acquisition, No Interference)
-134.5 dBm GPS
-135.5 dBm WAAS
Sensitivity (Drop Lock)
-144 dBm
Dynamic Range
> 20 dB
Lat/Lon Position Accuracy
<1.25 meter RMS horizontal, <2 meter vertical, with
WAAS
Velocity
1000 knots maximum (above 60,000 ft)
TTFF (Time To First Fix)
1:45 min. typical with current almanac, position, and
time
Reacquisition
10 seconds typical
Position Update Interval
0.2 sec (5 Hz)
1 PPS (Pulse Per Second)
275 Nsec of UTC second
Datum
WGS-84
SATCOM Compatibility
SATCOM compatibility is dependent upon antenna
selection.
Antenna Power Supply
35 mA typical, 40 mA max at 4.7 VDC
Summary of Contents for GTN 625
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