Feature Item Description
Chipset GSC 3f SiRFstarIII low power single chipset
General Frequency L1, 1575.42 MHz
C/A code 1.023 MHz chip rate
Channels 20
Accuracy Position 10 meters, 2D RMS
5 meters 2D RMS, WAAS corrected
Velocity 0.1 meters/second
Time 1 microsecond synchronized to GPS time
Datum Default WGS-84
Other selectable for other Datum
Time to First Fix (TTFF)
(Open Sky & Stationary Requirements)
Reacquisition 0.1 sec., average
Snap start 1 sec., average
Hot start 1 sec., average typical TTFF
Warm start 38 sec., average typical TTFF
Cold start 42 sec., average typical TTFF
Dynamic Conditions Altitude 18,000 meters (60,000 feet) max.
Velocity 515 meters/second (1000 knots) max.
Acceleration 4g , max.
Jerk 20 meters/second 3, max.
Power Main power input 3.3 ~ 5.0 VDC input
Power consumption ≈165 mW (continuous mode)
Supply Current ≈49 mA
Backup Power 1.65 ~ 5.0 VDC input.
Serial Port Electrical interface Two full duplex serial TTL interface.
Protocol messages NMEA-0183@4800 bps (Default)
Time-1PPS Pulse Level TTL
Pulse duration The 1PPS pulse width is 1 μs, this 1PPS is NOT suited to steer various oscillators (timing receivers, telecommunications system, etc).
Time reference At the pulse positive edge.
Measurement Aligned to GPS second, ± 1 microsecond
Environmental Characteristics Operating temperature range -30 °C to +85 °C
Storage temperature range -55 °C to +100 °C
Physical Characteristics Length 24 mm ± 0.1mm ( 0.94in)
Width 20 mm ± 0.1mm ( 0.79 in)
Height 2.9 mm ± 0.1mm ( 0.11 in)
Weight 2.5g
Software Core of firmware SiRF GSW 3.2.2
Baud rate 4800, 9600, 19200, 38400 or 57600 bps (default 4800)
Code type NMEA-0183 ASCII
Datum WGS-84
Protocol message GGA(1sec), GSA(5sec), GSV(5sec), RMC(1sec),VTG(1sec)
Output frequency 1 Hz