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GPS-20 Operating Manual
Rikaline
Rikaline Marketing Corp.
5F-1, 125, Roosevelt Road, Sec. 5, Taipei, Taiwan 116
Tel: ++886 2 2934 5456 Fax: ++886 2 2934 4373 E-Mail: info@rikaline.com.tw
web: www.rikaline.com.tw
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1.3.3.2 Power
GPS-20 5V Version
TTL
GPS-20 3.3V Version
TTL
Main Power
+5VDC±5% 3.3VDC±10%
Supply Current
170mA Typical 170mA Typical
Backup Power
+2.5V to 3.3V +2.5V to 3.3V
Backup Current
10µA Typical 10µA Typical
Packup Period
230hr (9.6 days) 230hr (9.6 days)
1.3.3.3 Datum
WGS 84
1.3.4 Performance
1.3.4.1 Acquisition
1) Tracks up to 12 satellites.
2) Update rate: 1 second.
3) Acquisition time
Reacquisition 0.1 sec., averaged
Snap Start 3 sec, averaged
Hot start 8 sec., averaged
Warm start 38 sec., averaged
Cold start 45 sec., averaged
1.3.4.2 Position Aaccuracy: (Non Differential GPS)
Position 5-25 meter CEP without SA
Velocity 0.1 meters/second, without SA
Time 1 microsecond synchronized GPS time
1.3.4.3 DGPS Accuracy (Differential GPS)
Position 1 to 5 meter, typical
Velocity 0.05 meters/second, typical
1.3.4.4 Dynamic Conditions
Altitude 18,000 meters (60,000 feet) max
Velocity 515 meters / second (1,000 knots) max
Acceleration 4 G, max
Jerk 20 meters/second
3
, max
1.3.4.5 1PPS Pulse
Level TTL
Pulse Duration 100ms
Time Reference at the pulse positive edge
Measurements Aligned to GPS second, ± 1 microsecond
1.3.5 Interfaces
1.3.5.1 Interface
Two full duplex serial communication, RS-232 or TTL compatible level, with user selectable baud rate
(4800-Default, 9600, 19200, 38400).
1.3.5.2 Protocol Message
SiRF Binary – Position, Velocity, Altitude, Status and Control
NMEA 0183 Version 2.2 ASCII output -- GGA, GLL, GSA, GSV, RMC, ZDA and VTG.