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The JS-NK40 is a high-precision GNSS antenna module supporting multi-system, multi-frequency RTK positioning. Featuring a next-gen GNSS chip, dual-core 2GHz CPU, anti-interference unit, and dedicated RTK coprocessor, it supports 1408 super channels for enhanced signal processing. Ideal for drones, lawnmowers, precision agriculture, and surveying, it ensures reliable, accurate positioning even in challenging environments.
Product Features
Based on high-performance JS-N2 module
Supports 1408 super channels
Supports multi-system multi-frequency high-precision RTK solution
RTK positioning data update rate up to 20Hz
Supports BDS B1I/B2I/B3I+GPS L1/L2/L5+GLONASS L1/L2+Galileo E1/E5a/E5b+QZSS L1/L2/L5+SBAS
Automatic identification of differential input RTCM format
Integrated TCXO, LNA, SAW, RTC
Integrated high-gain helical antenna
Lightweight and compact (39.80mm x35.00mm×32.0mm±0.3mm)，<10.2g
Instant RTK initialization
Performance Indicators
| Performance | Specifications |
| Receiver type | BDS B1I, B2I, B3I |
| GPS L1C/A, L2P(Y)/L2C, L5 | |
| Galileo E1, E5a, E5b | |
| GLONASS L1, L2 | |
| QZSS L1, L2, L5 | |
| Time-To-First-Fix | Cold Start < 30 s |
| Time Accuracy (RMS) | 20 ns |
| Velocity Accuracy (RMS) | 0.03 m/s |
| Initialization Time | < 5 s (typical) |
| Baud Rate | 9600–921600 bps (default 115200 bps) |
| Data Update Rate | 20 Hz |
Pin Parameters
| No. | Name | I/O | Description |
| 1, A | GND | - | Ground |
| 2, B | TX2 | O | UART2 output RTCM3 data |
| 3, C | PPS/RX2 | O/I | Serial Port (UART2: for 1PPS output <Default>/RTCM3 input) |
| 4, D | SDA | I/O | I2C Data (keep open if not used) |
| 5, E | SCL | I/O | I2C Clock (keep open if not used) |
| 6, F | TX1 | O | UART1 data output |
| 7, G | RX1 | I | UART1 data input |
| 8, H | VCC | P | Main Supply |
Product Application
UAV/Drones
Automotive Applications
Precision Agriculture
Handheld Devices
Logistics Security
Surveying and Mapping
Robotics
Smart Ports
Electric Power Grid
Smart Transportation
Protocols
| Parameter | Protocol |
| Data Format | NMEA 0183, Unicore |
| Differential Data | RTCM 3.X |
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