GPS BU-303
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BU-303
Electrical Characteristics (Receiver)
GPS Chipset SiRF Star II e/LP
Frequency L1, 1575.42 MHZ
C/A Code 1.023 MHz chip rate
Channels 12
Sensitivity -170 dBW
Accuracy
Position Horizontal 15m 2-D RMS (SA off)
Velocity 0.1m/sec 95% (SA off),
Time 1 micro-second synchronized to GPS time
WAAS 5m 2d RMS (WAAS enabled manually by user - WIN only)
Datum
Datum WGS-84
Acquisition Rate
Hot start 8 sec., average (with ephemeris and almanac valid)
Warm start 38 sec., average (with almanac but not ephemeris)
Cold start 45 sec., average (neither almanac nor ephemeris)
Reacquisition 0.1 sec. average (interruption recovery time)
Protocol
GPS Protocol Default: NMEA 0183 (Secondary: SiRF binary)
GPS Output Data SiRF binary >> position, velocity, altitude, status and control
NMEA 0183 MEA0183 V2.2 protocol, and supports
command: GGA, GSA, GSV, RMC, VTG, GLL v2.2 (VTG
and GLL are optional)
GPS transfer rate Software command setting (Default : 4800,n,8,1 for NMEA )
Dynamic Condition
Acceleration Limit Less than 4g
Altitude Limit 18,000 meters (60,000 feet) max.
Velocity Limit 515 meters/sec. (1,000 knots) max.
Jerk Limit 20 m/sec**3
Temperature
Operating -30°~ 80°C
Storage -40°~ 85°C
Humidity Up to 95% non-condensing
Power
Voltage 5V ±5%
Current 90mA typical
Physical Characteristics
Dimension 2.32" x 1.65" x 0.82" (59mm x 47mm x 12mm)
USB Cable Length 60" (USB)
Low Noise Amp
Amplifier Gain w/out cable 27 dB Typical
Filtering -25dB (+100 MHz)
Output VSWR 2.0 Max.
Voltage DC 3 ~ 5.0V
Current 15mA max @ 5VDC