Seiwa Si-Tex Vector 3D GPS - Manual (Page 38)

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Appendix B: Specifications
Table B-1 through Table B-5 provide the 3D’s GPS sensor, communication, power, mechanical, and
environmental specifications
.
Table B-1: GPS sensor specifications
Item Specification
Receiver type L1, C/A code with carrier phase smoothing
Channels Two 12-channel, parallel tracking
(Two 10-channel when tracking SBAS)
SBAS tracking 2-channel, parallel tracking
Update rate Standard 10 Hz, optional 20 Hz (position and heading)
Horizontal accuracy
< 1.0 m 95% confidence (DGPS
1
)
< 4.0 m 95% confidence (autonomous, no SA 2 )
Heading accuracy < 0.75° rms
Normal operation: GPS
Coasting (no GPS): Gyro
Heave accuracy < 30 cm rms 5
Normal operation: GPS
Coasting (no GPS): None
Pitch accuracy < 1.5° rms
Normal operation: GPS
Coasting (no GPS): Inertial sensor
Roll accuracy < 1.5° rms using accelerometer
Normal operation: Inertial sensor
Coasting (no GPS): Inertial sensor
Rate of turn 90
°
/s maximum
Cold start < 60 s typical (no almanac or RTC)
Warm start < 20 s typical (almanac and RTC)
Hot start < 1 s typical (almanac, RTC, and position)
Heading fix < 10 s typical (valid position)
Compass safe distance
30 cm (11.8 in)
4
Maximum speed 1,850 kph (999 kts)
Maximum altitude 18,288 m (60,000 ft)
Table B-2: Communication specifications
Item Specification
Serial ports 2 full-duplex RS-232
Baud rates 4800, 9600, 19200, 38400, 57600, 115200
Correction I/O protocol RTCM SC-104
Data I/O protocol NMEA 0183, NMEA 2000