Ruggedized FOG Inertial Navigation Systems with MRU (INS‑DM‑FI)
Where the INS-FI puts a fiber optic gyro core into a compact cylinder, the INS-DM-FI and INS-BM-FI put that same closed-loop FOG IMU inside the super-ruggedized, EMC and EMI shielded housing of the INS-DM family — and add motion reference output on top. INS-DM-FI is the dual-antenna build; INS-BM-FI runs a single antenna.
Four data streams from one box
The output set is what sets this unit apart: raw IMU accelerations, angular rates and magnetic field; AHRS heading, pitch and roll; MRU heave, surge and sway; and full INS positions, velocity, delta theta and delta velocity. Heave measures across ±300 m at 0.01 m resolution, with real-time accuracy of 5% or 0.05 m and post-processed accuracy of 2% or 0.02 m. For vessels, cranes and offshore platforms that need motion compensation alongside navigation, that removes a second sensor from the install.
FOG performance
Closed-loop fiber optic gyroscopes measure ±490 deg/sec at 200 Hz bandwidth, with 0.5 deg/hr bias repeatability over temperature, 100 ppm scale factor accuracy, 50 ppm non-linearity and 0.025 deg/√hr angular random walk. MEMS accelerometers span ±8 or ±40 g at 0.005 mg in-run bias stability. Free-inertial heading error stays under 0.5° with no GNSS and no magnetometer; land position drift holds 0.1% of distance travelled and aerial drift 3 NMPH. Pitch and roll reach 0.01° static and dynamic, 0.005° post-processed.
Positioning and receivers
RTK fixes to 1 cm horizontal and 2 cm vertical, TerraStar-C PRO to 2.5 cm, DGPS 0.4 m, SBAS 0.6 m. Dual-antenna heading resolves 0.08° on a 2 m baseline and 0.15° on 1 m, or 0.01° post-processed. Receiver choices span NovAtel OEM7720 and OEM719, Septentrio mosaic-X5, and u-blox ZED-F9P, ZED-F9P L5 and dual ZED-F9P.
Integration and build
Interfaces cover RS-232, RS-422, RS-485, CAN and Ethernet, with ARINC-429 on the .123457 variant for avionics work. Encoder support, a 64 GB data logger and three pressure-port options to Mach 2.5 are available, alongside an external ADC and Stand-Alone Magnetic Compass. Commercially exportable under ECCN 7A994. IP67 sealed, MIL-STD-461F EMC, MIL-STD-810 temperature calibration, MIL-STD-1275 compliance, -40 to +71 °C, altitude to 15,000 m, 185 dB acoustic noise. 160 × 149 × 96 mm, 2100 g.
Key features benefits & functionality
- Commercially exportable GPS-Aided Inertial Navigation System (ECCN 7A994)
- 3-in-1 strapdown system: IMU + AHRS + INS
- Fiber Optic Gyroscopes (FOG) & MEMS accelerometers Inertial Measurement Unit (IMU)
- NovAtel, u-blox, or Septentrio High Precision GNSS receiver
- Embedded Anti-Jamming and Spoofing mitigation features
- L1/L2/L5 GPS, GLONASS, GALILEO, BEIDOU, QZSS, IRNSS
- SP, SBAS, DGPS, RTK and PPP for real time operation
- Advanced, extendable, embedded Kalman Filter based sensor fusion algorithms
- State-of-the-art algorithms for Land, Aerospace and Maritime applications
- Full temperature calibration of all sensing elements according to MIL-STD-810 standard
- MIL-STD-461 standard based EMC, EMI, and ERD protection • MIL-STD-1275 compliance
- Environmentally sealed (IP67)
- Aiding data: Wind sensor, Air Speed Sensor, Doppler shift from locator (for long-term GPS denied), External position and External Heading
- External Air Data Computer (ADC) and Stand-Alone Magnetic Compass (SAMC)
INS-DM-FI Main Specifications
| Parameter | INS-DM-FI |
|---|---|
| Heading Accurasy | 0.08° |
| Position Accuracy | 1cm (RTK), 40cm (DGPS) |
| Pitch & Roll Accuracy | 0.01° Dynamic |
| GNSS Constellations | BDS, GAL, GLO, GPS, NavIC (IRNSS), QZSS |
| Corrections | PPK, PPP, RTK, SBAS |
| Magnetometer | External Magnetic Compass (optional) |
| Size (mm) | 160 x 149 x 96 |
| Weight (gram) | 2100 |
Related Products
Trademark Legal Notice: All product names, logos, and brands are the property of their respective owners. All company, product, and service names used in this document are for identification purposes only. Use of these names, logos, and brands does not imply endorsement. ABS, BeiDou, Cobham Limited, EdgeTech, Galileo, GLONASS, GPS, Hexagon, HYPACK, IMAGENEX, Kongsberg Seatex, LabVIEW, Livox, Norbit, NovAtel, NovAtel Inertial Explorer, Ouster, Qinsy, Quanergy, QZSS, R2Sonic, RIEGL, ROCK Robotic, ROS, Septentrio, Ship Motion Control SMC, Teledyne TSS, u-blox, Velodyne, WAASP, Waypoint.