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36 SMART ANTENNA User Manual Rev 6
Appendix A Technical Specifications
PERFORMANCE
a
Position Accuracy:
Single Point
< 5 m (16.4’) (CEP)
DGPS
< 1 m (3.28’) (CEP)
SBAS (for example WAAS and EGNOS)
< 1.5 m (4.92’)(CEP)
Velocity Accuracy: 0.05 m/s RMS
Measurement Precision:
L1 C/A Code 75 cm RMS
L1 Carrier Phase 1 cm RMS (differential channel)
Data Rate:
Measurements 5 Hz
Position 5 Hz
Time to First Fix:
Hot start: 15 s typical, with current almanac, position, time and ephemeris
Warm start: 45 s typical, with current almanac, position and time but no
recent ephemeris
Cold start: 166 s typical with no almanac, ephemeris, position or time
Signal Re-Acquisition:
< 1 s typical (5 s obscuration)
Dynamics: Velocity:
1852 km/h (514 m/s) (1151 miles/hr)
b
Acceleration:
4 G (39.2 m/s
2
) (128 feet/s
2
)
Altitude:
18 km (60,000’)
b
INTERNAL ANTENNA
Polarization: Right hand circular
Axial Ratio: 3 dB max
Radiation Coverage:
θ = 90° 4 dBic
15°
< θ < 90° -1.0 dBic
10° ≤ θ < 15° -2.5 dBic
VSWR: 2.0:1
Impedance:
50 Ω
HARDWARE SPECIFICATIONS
Input Voltage:
+9 to +36 VDC (reverse polarity protected and SAE
J1455 load dump protected)
Power Consumption: 1.4 W (typical)
Serial Communications:
COM1 input/output port and DGPS input port, available with RS-232 or RS-
422 interface up to 19,200 bps
Message Formats:
Input: COM1 NMEA or proprietary binary
DGPS IN
c
RTCM-104 types 1, 2, 3, 9
Output: COM1 NMEA or proprietary binary (NMEA types GGA,
GSA, GSV, RMC, VTG, ZDA, GLL plus
proprietary messages)
Continued on Page 37