M21/22 GNSS-INS Module
The M21 and M22 modules tightly couple an automotive-grade GNSS SoC with a fully temperature-calibrated IMU, delivering high-performance positioning and dead reckoning capabilities in GNSS-denied environments such as urban canyons and satellite outages. Taking advantage of Bynav's proprietary REAL (Ransac Enhanced Advanced Location) GNSS positioning engine, they feature improved fault tolerance under challenging multipath and interference conditions.
Supporting NRTK, PPP and PPP-RTK, the low-SWaP, full-constellation, full-frequency modules are ASIL B-rated and are ideal for drones, robotics, self-driving vehicles and ADAS. The M21 is available in a dual-antenna variant for high-precision attitude determination.
| M21 | M22 | M21D | |
| Dimensions | 17 x 22 x 2.75 mm | 17 x 22 x 2.75 mm | 16 x 21 x 2.6 mm |
| Weight | 3g | 4g | 2g |
| Power Consumption | 0.5W | 0.5W | 0.5W |
| Signals |
BDS B1I,B2I,B3I,B1C,B2a,B2b (PPP) GPS L1C/A, L1C, L2, L5 GLO G1,G2 GAL E1,E5a,E5b,E6 QZSS L1CA,L1C,L2,L5,L6(CLAS) NAVIC(IRNSS) L5 SBAS L1C/A L-band |
BDS B1I,B2I,B3I,B1C,B2a,B2b (PPP) GPS L1C/A, L1C, L2, L5 GLO G1,G2 GAL E1,E5a,E5b,E6 QZSS L1CA,L1C,L2,L5,L6(CLAS) NAVIC(IRNSS) L5 SBAS L1C/A L-band |
Main Antenna： BDS B1I, B2I, B1C, B2b (BDS-3 PPP) GPS L1 C/A, L1C, L2 GLO G1, G2 GAL E1, E5b QZSS L1 C/A, L1C, L2 Auxiliary Antenna： BDS B1I, B2I, B1C, B2b (BDS-3 PPP) GPS L1 C/A, L1C, L2C GLO G1, G2 GAL E1, E5b QZSS L1 C/A, L1C, L2 |
| Horizontal Positioning Accuracy |
Single Point 1.5m (RMS) RTK 1cm + 1ppm (RMS) |
Single Point 1.5m (RMS) RTK 1cm + 1ppm (RMS) |
Single Point 1.5m (RMS) RTK 1cm + 1ppm (RMS) |
| Vertical Positioning Accuracy |
Single Point 2.5m (RMS) RTK 1.5cm + 1ppm (RMS) |
Single Point 2.5m (RMS) RTK 1.5cm + 1ppm (RMS) |
Single Point 2.5m (RMS) RTK 1.5cm + 1ppm (RMS) |
| Timing Accuracy | 20 ns (RMS) | 20 ns (RMS) | 20 ns (RMS) |
| Velocity Accuracy | 0.03 m/s (RMS) | 0.03 m/s (RMS) | 0.03 m/s (RMS) |
| Attitude Accuracy | 0.1° (1m base line) | ||
| Dead Reckoning Position Error | 0.8% | 0.2% | 0.8% |
