Product Overview
The Merak-L05(70SR1) is a fiber optic gyroscope orientation and positioning system (INS-L) for land vehicles and drilling equipment. It finds true north to ≤2.0 mil RMS RMS and keeps heading within ≤1.0 mil RMS RMS over 2 hours without GNSS. With odometer fusion it maintains ≤0.5%D RMS position accuracy, making it ideal for survey-while-drilling, tunneling and GNSS-denied corridor mapping.
Key Features
- North-finding / orientation accuracy of ≤2.0 mil RMS RMS
- Heading keeping accuracy of ≤1.0 mil RMS RMS over 2 hours
- Position accuracy of ≤20 m CEP CEP with zero-speed correction, ≤0.5%D RMS with odometer
- Gyro bias repeatability ≤0.01°/hr and angular random walk ≤0.002°/√hr
- Fast alignment within ≤ 5 min at any orientation
- 130×130×100 mm housing, ≤2.2 kg, ≤15 W, MTBF ≥20,000 hours
Technical Specifications
| Parameter | Specification |
|---|---|
| Accelerometer bias repeatability (1σ, months) | ≤30 μg |
| Accelerometer scale factor accuracy (1σ, months) | ≤30 ppm |
| Gyro bias repeatability (1σ) | ≤0.01°/hr |
| Gyro scale factor accuracy (1σ) | ≤30 ppm |
| Gyro accuracy (10 s, 1σ) | ≤0.02°/hr |
| Angular random walk (1σ) | ≤0.002°/√hr |
| Angular rate | ≥ ±400°/s |
| Acceleration | ≥ 25 g |
| Attitude | Any orientation |
| Alignment time | ≤ 5 min |
| Interfaces | 3 × RS-422 full-duplex, 1 × 100 M Ethernet |
| Position accuracy (10 min zero-speed correction / 2 h) | ≤20 m CEP |
| Position accuracy (INS/odometer) | ≤0.5%D RMS |
| Position accuracy (INS/GNSS) | Better than satellite accuracy |
| North-finding / orientation accuracy | ≤2.0 mil RMS |
| Heading keeping accuracy (2 h) | ≤1.0 mil RMS |
| Heading accuracy (INS/GNSS) | ≤1.0 mil RMS |
| Pitch & roll accuracy | ≤0.5 mil RMS |
| Power consumption | ≤ 15 W |
| Dimensions (L×W×H) | 130×130×100 mm |
| Weight | ≤2.2 kg |
| Operating temperature | -40℃ – +60℃ |
| Shock | 15 g half-sine, 11 ms |
| Supply voltage | DC 24 V ±25% |
| Vibration | 20–2000 Hz, 6.06 g |
| MTBF | ≥ 20,000 hours |
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