iNAT-RQT-400x: RLG Based Navigation, Surveying & Control System ( 0.004 °/h; ITAR free)

High Performance Low Weight Ring Laser Gyro Based INS of Class 0.004...0.01 °/h

The iNAT-RQT-400x is a lfamily of ight weight small-size high accurate advanced RLG based INS. It is available in three performance classes:

iNAT-RQT-4001: 0.0020 deg/sqrt(hr) / 0.004 deg/hr / 0.05 mg
iNAT-RQT-4002: 0.0025 deg/sqrt(hr) / 0.007 deg/hr / 0.75 mg
iNAT-RQT-4003: 0.0050 deg/sqrt(hr) / 0.010 deg/hr / 0.10 mg

They consist of  3 airborne grade ring laser gyro axes and 3 servo accelerometer axes, integrated GNSS Receiver (GPS, GLONASS, GALILEO, BEIDOU), wheel sensor interface and an advanced 42+ state Kalman filter based INS/GNSS loosly or tightly coupled data fusion.

The ring laser technology provides a well-proven and mature long time true north and exceptional navigation accuracy also under harsh environmental conditions (temperature gradients, vibration) where other gyro technologies are already significantly limited due to certain physical effects.   

The iNAT series is used for navigation, guidance and control of vehicles, stabilization of platforms, surveying reference as ground truth etc. in the fields of industrial, automotive, surveying, defense and space applications. The full accuracy range of the members of the iNAT family from economic to high-end can be found here:

Link to the entire iNAT system family


  • Applications: GNSS aided navigation, free inertial Navigation (air, land, sea, subsea), attitude heading reference (AHRS), surveying (LIDAR, SAR etc.), UAV, AUV and RPV guidance & control
  • Real-time data output: longitude, latitude, alttude / height, velocty, roll, pitch, yaw / heading, angular rates, acceleration, status, calibrated raw data INS/GNSS (for post-processing)
  • Interfaces: RS422 (UART and HDLC / SDLC) Interfaces, CANaero / ARINC825 / CAN, ARINC429, Ethernet (TCP/IP and UDP), SYNC-I/Os
  • Data Output rate up to 400 Hz (each data log separately adjustable)
  • Minimum latency and minimum jitter on output data
  • Measurement range +/-395 deg/s, +/-20 g
  • Heading accuracy 0.04...0.086 deg sec lat (depending on class)
  • further parameters. see datasheet (link below)
  • Integrated 42+ state tightly or loosly coupled data fusion
  • Internal GNSS engine, up to L1L2 GPS+GLONASS+GALILEO, RTK, L-Band; SAASM capability available as optional integrated hardware
  • Internally up to 32 GByte non-volatile memory for data storage
  • Power Supply: 10...36 V DC, < 20 W; overvoltage protected up to 60 V; 50 ms hold-up time according to DO160E.
  • Modular System architecture: customized applications can be integrated by iMAR easily (please contact our sales engineers for Details, e.g. for the available SDK under RT-LINUX). So the iNAT can provide arbitrary data and command protocols according to customer requirement, e.g. to substitute other navigation systems by iNAT (e.g. for Form-Fit-Function replacements)
  • EMI-EMC protection and qualification according to DO160E / MIL-STD-704D / MIL-STD-461E / MIL-STD-810G
  • iNAT-RQT is not ITAR controlled. iNAT-RQT can be operated in most countries worldwide and only a standard dual-use export license is required; no detailed export control required within the EU, Canada, Japan, New Zealand, USA (only EU001 procedure required)


Further information:

Datasheet iNAT-RQT-4001/-4002/-4003

iXCOM-CMD: Easy-to-use software (GUI) to operate iNAT systems (incl. powerful wizard)

Publication: INS/GNSS/Odometer Data Fusion in Railway Applications using iNAT-RQT (Symposium Inertial Sensors and Systems, 2016)

More manuals, user reports and other information in our download area.

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