The JS-SK40 is a compact, multi-frequency RTK positioning module offering high-precision, reliable GNSS+ technology. With advanced interference detection and mitigation, it ensures accurate positioning in challenging environments. Featuring full-sky tracking and ultra-low power consumption, it’s ideal for drones, robotics, and autonomous systems.
Product Features
Supports dual antenna input
789 hardware channels for simultaneous operation
AIM+ with advanced interference and spoofing detection and automatic mitigation features
LOCK+ with excellent robust tracking capability against mechanical shock and vibration、IONO+ with advanced ionospheric interference protection
APME+ multipath mitigation to separate direct signals from signals reflected off nearby buildings
Provides full raw measurement data
RTK positioning data update rate up to 20Hz
Compact size with ultra-low power consumption
Full-sky satellite tracking: Multi-constellation, quad-band GNSS receiver
Compact and lightweight (39.80mm x35.00mm×32.41mm±0.3mm), <10.2g
RTK centimeter-level positioning
Performance
| Performance | Technical Parameters |
| Receiver type | BDS B1I, B1C, B2a, B2I, B2b, B3I |
| GPS L1C/A, L1C, L2PY, L2C, L5 | |
| GLONASS L1CA, L2CA, L2P, L2C, L3 CDMA | |
| Galileo E1, E5a, E5b, E6 | |
| QZSS L1C/A, L1C/B, L2C, L5, L6 | |
| Time-To-First-Fix | Cold Start: 35 s |
| Hot Start: 10 s | |
| Reacquisition: 1 s | |
| RTK Initialization¹: 7 s | |
| Sensitivity | Tracking Sensitivity: -150 dBm (20 dB-Hz) |
| Acquisition Sensitivity: -140 dBm (30 dB-Hz) | |
| Positioning Accuracy | 3D<br>Horizontal: 1.5 m<br>Vertical: 2 m |
| DGNSS<br>Horizontal: 0.4 m<br>Vertical: 0.7 m | |
| RTK²<br>Horizontal: 0.6 cm + 0.5 ppm<br>Vertical: 1 cm + 1 ppm | |
| Time Accuracy | PPS: 1.4 ns |
| Event: < 3 ns | |
| Latency | < 10 ms |
| Velocity Accuracy | 3 cm/s |
| Baud Rate | 4800 – 4M bps (default 115200 bps) |
| Maximum Data Update Rate | 20 Hz |
Pin Parameters
| No. | Name | I/O | Description |
| 1, A | GND | G | Ground |
| 2, B | TX2 | O | UART2 Data Output |
| 3, C | PPS/RX2 | O/I | Serial port (UART2: Used for 1PPS Output <Default> / Data Input) |
| 4, D | SDA | I/O | I2C Data (keep open if not used) |
| 5, E | SCL | I/O | I2C Clock (keep open when not used) |
| 6, F | TX1 | O | UART1 Data output |
| 7, G | RX1 | I | UART1 Data input |
| 8, H | VCC | I | Power Supply Voltage |
| 9 | RF Connector | - | Insert external antenna for dual-antenna positioning/orientation.<br>Antenna connector type: MMCX |
Product Application
UAV/Drones
Automotive Applications
Precision Agriculture
Marine Navigation
Logistics & Security
Surveying & Mapping
Robotics
Smart Ports
Power Grid & Electricity
Smart Transportation
Protocols
| Parameter | Protocol |
| NMEA 0183 v2.3, v2.4, v3.0, v4.0 | Standard Protocol |
| SBF | Proprietary Protocol |
| RTCM3.X | Input (MSM included) |
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