| General |
| Chipset |
MTK MT3339 |
| Frequency |
L1, 1575.42MHz |
| C/A Code |
1.023 MHz |
| Channels |
66 channels |
| SBAS |
WAAS, EGNOS, GAGAN,MSAS Supported |
| Datum |
WGS84(Default), Tokyo-M, Tokyo-A, User Define |
| CPU |
ARM7EJ-S |
| MTTF (mean time to failure) |
>10 years |
| Dimensions |
| Length/Width/Height |
15*14*2.55 mm |
| Weight |
2 g |
| Performance Characteristics |
| Position Accuracy |
Without aid：3.0m 2D-RMS |
| < 3m CEP (50%) without SA (horizontal) |
| DGPS (RTCM, SBAS (WAAS, EGNOS, MSAS))：2.5m |
| Velocity Accuracy |
Without aid：0.1 m/s |
| DGPS (RTCM, SBAS (WAAS, EGNOS, MSAS))：0.05m/s |
| Acceleration Accuracy |
Without aid：0.1 m/s² |
| DGPS (RTCM, SBAS (WAAS, EGNOS, MSAS))：0.05m/s² |
| Timing Accuracy |
10 ns RMS |
| Sensitivity |
Acquisition：-148dBm (Cold Start) |
| Reacquisition：-163dBm |
| Tracking：-165dBm |
| Maximum Update Rate |
Up to 10Hz(Default: 1Hz) |
| Acquisition (Open sky, stationary) |
| Reacquisition Time |
Less than 1 second |
| Hot start |
1.0s (Typical) |
| Warm start |
34s (Typical) |
| Cold start |
35s (Typical) |
| Dynamic |
| Altitude |
Maximum 18,000m |
| Velocity |
Maximum 515m/s |
| Acceleration |
Maximum 4G |
| Power |
| Input Voltage |
DC 3.3V Typical |
| Power Consumption @ 3.3V |
Acquisition：26mA Typical |
| Tracking：22mA Typical |
| I/O |
| Signal Output |
TTL level, 8 data bits, no parity, 1 stop bit |
| Available Baud Rates |
4800/9600/38400/57600/115200 bps(Default：9600) |
| Protocols |
NMEA 0183 v3.01 (Default：GGA,GSA,GSV,RMC,VTG)
RTCM
MTK NMEA Command
Network Assistance Messages |
| Data output Interface |
| TXDA/RXDA |
Function: NMEA output and PMTK command input |
| Setting: 9600 bps/8/N/1 |
| Data: GGA(1sec),GSA(1sec),GSV(1sec),RMC(1sec) |
| Default Setting |
| DGPS |
SBAS* |
| Datum |
WGS84 |
| Environment |
| Operating Temperature |
-45 ℃ to 85 ℃ |
| Storage Temperature |
-50 ℃ to 125 ℃ |
| Operating Humidity |
5% to 95% (no condensing) |
