The JS-ATP38-M is a cost-effective, low-power, multi-mode dual-frequency positioning module supporting GPS, BDS, GLONASS, Galileo, QZSS, and SBAS (L1+L5). Designed to meet the needs of diverse applications and end products, it is powered by a high-performance SoC positioning engine that delivers excellent sensitivity, fast acquisition, and robust interference suppression. Even in challenging signal environments, the JS-ATP38-M ensures precise and reliable positioning performance.
Product Features
Based on high-performance GNSS SOC series
135 channels (L1:75, L5:60)
Cold start acquisition sensitivity of -148dBm, tracking sensitivity of -165dBm
Up to 10Hz navigation update rate
Supports GPS, BDS, GLONASS, Galileo, QZSS, and SBAS
Supports AGPS
Indoor and outdoor multipath detection and compensation
Rich hardware interface for various configurations
Integrated TCXO, LNA, SAW, and RTC
Compact size ( 38 *11.5 mm±0.3mm), suitable for space-sensitive applications
Complies with ROHS standards
Supports standard NMEA 0183 V3.01/V4.10
Supports 1PPS output
Number of channels in wearable mode is L1:42, L5:30
Performance
| Parameter | Specification |
| Constellation Frequency | GPS L1CA L5 BDS B1I B2a Galileo E1B E1C E5a GLONASS L1OF QZSS L1CA L1SAIF L5 SBAS WAAS EGNOS MSAS GAGAN |
| Sensitivity | Tracking and Navigation -165dBm |
| Cold Start -148dBm | |
| Time-To-First-Fix | Cold Start 24s |
| Hot Start 1s | |
| GNSS Position accuracy | Horizontal 3G+B 1.0m (L1+L5)；2.5m (L1) |
| vertical 2.25m | |
| Time pulse signal accuracy | 1PPS 10ns |
| Speed accuracy | 0.05m/s |
| Operational restrictions | Acceleration 4g |
| Altitude 10000m | |
| speed limit 100m/s | |
| Frequency of time pulse signal | 1Hz |
| Baud Rate | 4800-921600 bps（ Default 115200 bps） |
| Max navigation update rate | 10 Hz （Default 1Hz） |
Pin Parameters
| PIN | Name | I/O | Description |
| 1 | SCL | O | IIC-SCL |
| 2 | RXD | I | UART data input |
| 3 | TXD | O | UART data output |
| 4 | GND | G | GND |
| 5 | VCC | P | Main power supply |
| 6 | SDA | O | IIC-SDA |
Product Application
Automotive applications
Maritime navigation, fleet management
Intelligent logistics dispatching
Ground vehicle tracking and urban intelligent traffic management
Intelligent robots
Wearable devices
Personal travel and wilderness adventures
Emergency rescue
Protocols
| Protocol | Type |
| NMEA 0183 V3.01/V4.10 | INPUT/OUTPUT, ASCII |
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