The CK43-2 is a high-precision multi-constellation, multi-frequency RTK positioning module. Built with an advanced GNSS SoC engine, it integrates inertial navigation, high-speed processing, and dedicated RTK co-processor. Supporting BDS-2, BDS-3, GPS, GLONASS, Galileo, and QZSS, it ensures reliable positioning with superior sensitivity and anti-interference technology, even in complex environments. Ideal for drones, robotics, precision agriculture, and surveying.
Product Features
Based on high-performance GNSS C9B
Supports high-precision RTK positioning calculation across multiple frequencies throughout the entire system
RTK positioning data update rate up to 50Hz
Supports integrated navigation algorithms
Integrated high-gain antenna
Its compact size (48.0 mm x 43.2 mm x 37.0 mm ± 0.5 mm) makes it suitable for space-sensitive applications
Instant R TK initialization technology
Capable of suppressing potential narrowband and single-tone radio interference signals within the GNSS signal band, with an interference-to-signal ratio of up to 60 dB
Performance
| Performance | Technical Parameters |
| Constellation Frequency | BDS -2 B1I, B2I, B3I BDS -3 B1I, B1C, B2A, B2B, B3I |
| GPS L1 C/A, L1C, L2 P, L2C, L5 | |
| GLONASS G1, G2, G3 | |
| Galileo E1, E5a, E5b, E5 ALTBoC, E6 c | |
| QZSS L1 C/A, L2C, L5, L1C | |
| SBAS L1C/A, L5 | |
| IRN SS L5 | |
| First positioning time | Cold start: 20 s |
| Warm start: 10 s (using RTC) | |
| Signal capture | Loss and recapture: 1 second |
| Signal tracking sensitivity: -155 dBm | |
| Signal acquisition sensitivity: -140 dBm | |
| Measurement accuracy | Pseudorange accuracy ≤10 cm |
| Carrier phase accuracy ≤1 mm | |
| Positioning accuracy | 3D (1σ, PDOP ≤4)<br>Horizontal: 1.5 m<br>Vertical: 3 m |
| RTK (RMS)<br>Horizontal: 0.8 m + 1 ppm<br>Vertical: 1.5 m + 1 ppm | |
| PPS timing accuracy (RMS) | 20 ns |
| Velocity accuracy | ≤ 0.02 m/s |
| RTK initialization time | <5 s (baseline length less than 10 km) |
| Gyroscope | Measurement range: ±125°/s |
| Zero bias repeatability: 0.5°/s | |
| Zero bias stability: 5°/h | |
| Angle random walk: 0.12°/√(h) | |
| Acceleration | Measurement range: ±2 g |
| Zero-biased repeatability: 20 mg | |
| Zero bias stability: 50 µg | |
| Angle random walk: 0.07 m/s/√(h) | |
| Auxiliary dead reckoning (error) | 3% d (d is the distance traveled) |
| PPP | PPP initialization time: 20 min |
| PPP Precision Plane Elevation: 0.1 m | |
| Baud Rate | 115200 – 921600 bps (Default 115200 bps) |
| Maximum data rate | Single-point positioning at 50 Hz (default 5 Hz) |
| RTK frequency set at 50 Hz (default 5 Hz) | |
| IMU 100 Hz (default 5 Hz) |
Pin Parameters
| S.N. | Name | I/O | Description |
| 1 | GND | G | Ground |
| 2 | TX2 | O | UART2 Output RTCM3 data |
| 3 | PPS/RX2 | O/I | Serial port (UART2 for 1PPS output <Default>/RTCM3 input) |
| 4 | SDA | I/O | I2C data (keep open when not in use) |
| 5 | SCL | I/O | I2C clock (keep open when not in use) |
| 6 | TX1 | O | Serial port 1 data output |
| 7 | RX1 | I | Serial port 1 data input |
| 8 | VCC | I | Power supply voltage |
Product Application
Drones
Automotive Applications
Precision agriculture
Maritime Navigation
Logistics security
Surveying and mapping
intelligent robotsS
mart Port
Power grid
Smart Transportation
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