G900X/G950 Installation and Maintenance Manual – GIA 63W
Page 4-3
190-00719-00
Revision D
4.2 Electrical
Specifications
4.2.1 WAAS GPS Specifications
Table 4-1. GIA 63W GPS Specifications
Characteristics Specifications
Acquisition Time
a) Search-the-Sky (without almanac, without initial position
or time): 5 minutes
b) AutoLocate™ (with almanac, without initial position or
time): 5 minutes
c) Cold Start (position known to 300 nm, time known to 10
minutes, with valid almanac): 45 seconds
d) Warm Start (position known to 10 nm, time known to 10
minutes, with valid almanac and ephemeris): 15 seconds
Max Velocity
1000 knots
Dynamics 6
g
Number of channels
15 (12 GPS and 3 GPS/WAAS/SBAS)
Frequency
1575.42 MHz L1, C/A code
Sensitivity (acquisition)
-116 dBm to -134.5 dBm GPS
-116 dBm to -135.5 dBm WAAS
Sensitivity (drop lock)
-144 dBm
Dynamic range
>20dB
Lat/Long position frequency
<1 meter RMS typical with WAAS (horizontal/vertical)
Velocity
1000 knots maximum (above 60,000 ft)
TIFF (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
Compatible on aircraft equipped with SATCOM
Antenna power supply
35 mA typical, 40 mA max at 4.7 VDC
