A airborne optical-gyro inertial navigation system (INS) (gyro bias repeatability ≤30μg) with fast startup, RS-422/Ethernet output and extended-temperature operation, suited to demanding navigation and stabilization applications.
The Dubhe-A1 Airborne Optical Gyro Inertial Navigation System (INS-A) is an airborne optical-gyro inertial navigation system (INS-A) from the Merak series. It integrates fiber optic gyroscopes (or, for the Dubhe-A1 high-end model, laser gyroscope technology) with quartz flexible accelerometers in a strapdown architecture and supports both ground-vibration-based and in-air alignment. The unit delivers a dynamic range of at least ±400°/s with excellent bias stability and low angular random walk. Key performance figures include Accelerometer Bias Repeatability (monthly, 1σ) ≤30μg; Accelerometer Scale Factor Accuracy (monthly, 1σ) ≤30ppm; Gyro Bias Repeatability (1σ) ≤0.005°/hr; Gyro Scale Factor Accuracy (1σ) ≤10ppm; Gyro Accuracy (10 s, 1σ) ≤0.01°/hr(100s,1σ); Angular Random Walk (1σ) ≤0.003°/√hr. A companion “Deep Pilot” variant (SD-JH1) with the same specifications is also available. Electrical interfacing is provided through high-speed serial or Ethernet links with fast startup, and the unit operates over an extended industrial temperature range with high MTBF for long-endurance missions. Typical applications include fixed-wing UAVs, rotary-wing UAVs and special aerial platforms that require high-accuracy navigation, guidance and attitude reference. All specifications below are taken directly from the manufacturer’s 2026 catalog and datasheet.
Key specifications: Accelerometer Bias Repeatability (monthly, 1σ): ≤30μg; Accelerometer Scale Factor Accuracy (monthly, 1σ): ≤30ppm; Gyro Bias Repeatability (1σ): ≤0.005°/hr; Gyro Scale Factor Accuracy (1σ): ≤10ppm; Gyro Accuracy (10 s, 1σ): ≤0.01°/hr(100s,1σ); Angular Random Walk (1σ): ≤0.003°/√hr.
Specifications
| Parameter | Value | Unit |
|---|---|---|
| Accelerometer Bias Repeatability (monthly, 1σ) | ≤30μg | |
| Accelerometer Scale Factor Accuracy (monthly, 1σ) | ≤30ppm | |
| Gyro Bias Repeatability (1σ) | ≤0.005°/hr | |
| Gyro Scale Factor Accuracy (1σ) | ≤10ppm | |
| Gyro Accuracy (10 s, 1σ) | ≤0.01°/hr(100s,1σ) | |
| Angular Random Walk (1σ) | ≤0.003°/√hr | |
| Position Accuracy (Pure Inertial) | ≤1nm/1h,CEP | |
| Position Accuracy (INS/GNSS-aided) | better than satellite accuracy | |
| speed accuracy | pure inertia | ≤1.2m/s,RMS |
| Angular Rate Range | ≥±400°/sec | |
| Angular Acceleration | 100000°/s² | |
| Acceleration Range | ≥25g | |
| Attitude | Any Orientation | |
| Input/Output Interface | 3 RS422 full-duplex serial ports, 1 100M Ethernet port | |
| Alignment Time | ≤5min | |
| Heading Accuracy (Pure Inertial) | ≤0.05°sec(L),RMS | |
| Heading Accuracy (INS/GNSS-aided) | ≤0.03°,RMS | |
| Pitch & Roll Accuracy (Pure Inertial) | ≤0.03°,RMS | |
| Pitch & Roll Accuracy (INS/GNSS-aided) | ≤0.01°,RMS | |
| Power Consumption | ≤20W | |
| Dimensions (L×W×H, mm) | 195×160×108 | |
| Weight | ≤3.9kg | |
| Operating Temperature | -40°C~60°C | |
| Shock | 15g, Half-sine wave 11ms | |
| Input Voltage | DC24V(±25%) | |
| Cooling | Conduction to mounting plate | |
| Vibration | 20~2000Hz,6.06g | |
| MTBF | ≥20000 hours |
All specifications are taken from the manufacturer’s current datasheet.
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