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3DM-RQ1™ -45

Ruggedized Tactical Grade GPS-Aided Inertial Navigation System

The 3DM-RQ1™ -45 is a compact, ruggedized, tactical-grade all-in-one navigation solution with integrated GPS and magnetometers, high noise immunity, and exceptional performance.  It takes advantage of some of the latest mems sensor technology, exhaustive callibration, and a custom made Kalman Filter to deliver capibillities that rival units that cost many times more. 

Product Highlights

  • High performance integrated GPS receiver and MEMS sensor technology provide direct and computed PVA outputs in a small package.
  • Triaxial accelerometer, gyroscope, magnetometer, and temperature sensors, and a pressure altimeter achieve the best combination of measurement qualities.
  • Dual on-board processors run a sophisticated Extended Kalman Filter (EKF) for excellent position, velocity, and attitude estimates.
  • Ruggedized enclosure designed to meet DO-160G for deployment in harsh environments

The LORD MicroStrain® 3DM-GX4 ® family of industrial grade inertial sensors provides a wide range of triaxial inertial measurements and computed attitude and navigation solutions. In all models, the Inertial Measurement Unit (IMU) includes direct measurement of acceleration, angular rate, and atmospheric pressure. Sensor measurements are processed through a sophisticated estimation filter  algorithm to produce high accuracy computed outputs with compensation options for magnetic and linear acceleration anomalies, sensor biases, auto-zero update, and noise offsets. The computed  outputs vary between models and can include pitch, roll, yaw, a complete attitude, heading, and reference solution (AHRS) or a complete position, velocity and attitude solution (PVA), as well as integrated GPS outputs. All sensors are fully temperature compensated and calibrated over the operating temperature. The use of Micro- Electro- Mechanical System (MEMS) technology allows for highly accurate, small, lightweight devices.
The LORD MicroStrain® MIP™ Monitor software can be used for device configuration, real time measurement monitoring, and data recording. Alternatively, the MIP™ Data Communications Protocol is available for users who want to develop customized software solutions.

Best in Class Performance

  • Fully calibrated, temperature compensated, andmathematically aligned to an orthogonal coordinatesystem for highly accurate outputs
  • Bias tracking, error estimation, threshold flags, andadaptive noise, magnetic, and gravitational field modelingallow for fine tuning to conditions in each application.
  • Compact, low profile, and lightweight

Ease of Use

  • Easy integration via comprehensive SDK
  • Common protocol with the 3DM-GX3® and 3DM-GX4® sensor families for easy migration

Cost Effective

  • Out-of-the box solution reduces development time.
  • Volume discounts


Integrated sensors

Triaxial accelerometer, triaxial gyroscope, triaxial magnetometer*, temperature sensors, and GPS receiver

Data outputs

Inertial Measurement Unit (IMU) outputs: acceleration, angular rate, magnetic field*, ambient pressure, deltaTheta, deltaVelocity

Computed outputs

Extended Kalman Filter (EKF): LLH position, NED velocity, attitude estimates (in Euler angles, quaternion, orientation matrix), bias compensated angular rate, pressure altitude, gravity-free linear acceleration, gyroscope and accelerometer bias, scale factors and uncertainties, gravity and magnetic models, and more.

Global Positioning System outputs (GPS): LLH position, ECEF position and velocity, NED velocity, UTC time, GPS time, SV. GPS protocol access mode available.

Inertial Measurement Unit (IMU) Sensor Outputs





Measurement range

±5 g



±75, ±150, ±900

°/sec (options)




±0.03 % fs

±0.03 % fs

±0.4 % fs


<0.04 mg



Bias instability

±0.02 mg



Initial bias error

±0.001 g


±0.003 Gauss

Scale factor stability

±0.05 %

±0.05 %

±0.1 %

Noise density

50 µg/Hz


100 µGauss/Hz

Alignment error




Adjustable bandwidth

250 Hz (max)

160 Hz (max)


Vibration induced noise


0.06°/s RMS/g



Vibration rectification error (VRE)





IMU filtering

4 stage filtering: analog bandwidth filter to digital sigma-delta wide band anti-aliasing filter to (user adjustable) , low pass filter; coning and sculling integrals computed at 1 kHz

Sampling rate

10 kHz

10 kHz

50 Hz

IMU data output rate

1 Hz to 500 Hz

Computed Outputs

Position accuracy

±2.5 m RMS horizontal, ± 5 m RMS vertical (typ)

Velocity accuracy

±0.1 m/s RMS (typ)

Attitude accuracy

±0.1° RMS roll & pitch, ±0.5° RMS heading (typ)

Attitude heading range

360° about all axes

Attitude resolution

< 0.01°

Attitude repeatability

0.1° (typ)

Calculation update rate

500 Hz

Computed data output rate

1 Hz to 500 Hz

Global Positioning System (GPS) Outputs

Receiver type

50-channel u-Blox 6 engine GPS, L1 frequency, C/A


GPS data output rate

1 Hz to 4 Hz


Cold start: 36 sec, aided start: 36sec, hot start: <1 sec


Tracking: -159 dBm, cold start: -147 dBm, hot start: -156 dBm

Velocity accuracy

0.1 m/sec

Heading accuracy


Horizontal position accuracy

GPS: 2.5 m CEP SBAS: 2.0 m CEP

Time pulse signal accuracy

30 nsec RMS

< 60 nsec 99%

Acceleration limit

4 g

Altitude limit

No limit

Velocity limit

500 m/sec (972 knots)

Operating Parameters


RS422 (9600 bps to 460,800 bps, default 115,200)

Power source

+ 10 to + 28 V dc

Power consumption

standard model: 2.5 W (typ)

low temperature model: 2.5 W (typ) at 0 °C to +80

°C, up to 6 W continuous and 25 W occasional at

-55 °C to 0 °C (for internal heater)

Operating temperature

-40 °C to +80 °C

(-55 °C to +80 °C low temperature model available*)

Vibration limit

6 g RMS, 10 Hz to 2 kHz

Mechanical shock limit

750 g (half-sine, 2 msec powered, any axis)

MTBF 180,000 hours (Telcordia method I, AC/30C)

Physical Specifications


88.3 mm x 76.2 mm x 22.2 mm


205 grams

Environmental rating


Enclosure material


Regulatory compliance




Data/power output: 7 pin circular Glenair series 801

GPS antenna: SMA type


MIPMonitor, MIPHard and Soft Iron

Calibration, Windows XP/Vista/7/8 compatible


Protocol compatibility with 3DM-GX3® and 3DM- GX4® sensor families.

Software development kit (SDK)

MIPdata communications protocol with sample code available (OS and computing platform independent)


*Magnetometers are not available with the low temperature option

#1606: How do I set the 3DM-RQ1-45 back to its default settings?

Using MIP Monitor software, to reset the device to the factory defaults:

  • Establish communication as normal with the sensor.
  • Click Settings.
  • Click Load Default Settings and a message box pops up.
  • Click OK and the message box disappears.
  • Click Settings again.
  • Click Save Current Settings and a message box pops up.
  • Click OK and the message box disappears.

This process does not erase any hard and soft iron calibration that may be on the device.

The Hard and Soft Iron Cal software we provide must be used to do that.


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How To Order

To discuss configuration for your specific system requirements, please use our contact sales page.

For large quantity orders or OEM discussions, please contact Michael_Robinson@LORD.COM.

If you are outside the US, please contact one of our distributors.


Accurate navigation and attitude under dynamic conditions such as:

  • GPS-aided navigation system
  • Unmanned vehicle navigation
  • Platform stabilization, artificial horizon
  • Satellite dish, radar, and antenna pointing
  • Health and usage monitoring of vehicles

Related Products

  • 3DM-GX3-453DM-GX3® -45 -- Product no longer stocked – limited availability - Miniature GPS-Aided Inertial Navigation System
  • 3DM-GX4-253DM-GX4 -25™ - Attitude Heading Reference System (AHRS)
  • 3DM-GX4-153DM-GX4-15™ - Miniature Inertial Measurement Unit (IMU), Vertical Gyro, and Vertical Reference Unit
  • 3DM-GX4-453DM-GX4-45™ - GPS-Aided Inertial Navigation System (GPS-INS)