M992-INS integrates dual-antenna GNSS reception and inertial processing on a compact embedded board for autonomous vehicles and robots. Its tightly coupled engine combines satellite and IMU measurements to maintain navigation through brief signal interruptions, delivering RTK accuracy of 0.8 cm + 1 ppm horizontally and heading accuracy of 0.1° per meter of antenna baseline.
Automatic lever-arm calibration eliminates manual measurements during installation. The board can accept a higher-grade external IMU and L-band corrections, and provides GNSS position and heading data at up to 20 Hz plus fused INS position data at up to 1,000 Hz. Serial, CAN and Ethernet interfaces are paired with PPS, gPTP and NTP timing for synchronization with other onboard systems.
Specifications:
| Dimensions | 71 × 45 × 10 mm |
| Weight | 24 g |
| RTK horizontal accuracy | 0.8 cm + 1 ppm |
| RTK vertical accuracy | 1.5 cm + 1 ppm |
| Velocity accuracy | 0.03 m/s |
| Heading accuracy | 0.1° per 1 m baseline |
| GNSS position & heading output | 10 Hz; 20 Hz maximum |
| INS position output | 200 Hz; 1,000 Hz maximum |
| Dead-reckoning accuracy | 0.2% at 1 km over 3 min |
| Timing accuracy | PPS: ≤10 ns gPTP: ≤1 µs NTP: ≤10 ms |
| IMU ranges | Gyroscope: ±300°/s Accelerometer: ±6 g |
| Interfaces | 3 × RS-232 1 × RS-422 2 × CAN 1 × Ethernet 1 × 1PPS |
