The 3DM-GQ4-45 is a compact, tactical-grade all-in-one navigation solution with integrated GNSS and magnetometers, high noise immunity, and exceptional performance.

Product Highlights

High performance integrated multi-constellation GNSS receiver and MEMS sensor technology provide direct and computed PVA outputs in a small package

  • Triaxial accelerometer, gyroscope, magnetometer, 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
  • Improved position outputs with concurrent tracking of up to two GNSS constellations (GPS/QZSS, GLONASS, BeiDou)
Datasheet Manual
Where to Buy?
U.S. International OEM

List Price:

Best in Class Performance

  • Fully calibrated, temperature-compensated, and mathematically aligned to an orthogonal coordinate system for highly accurate outputs
  • Bias tracking, error estimation, threshold flags, and adaptive noise, magnetic, and gravitational field modeling allow for fine tuning to conditions in each application
  • High performance, low drift gyros with noise density of 0.002°/sec/√Hz and VRE of 0.001°/s/g2RMS
  • Smaller and lighter than most tactical grade GNSS/INS units

    Ease of Use

  • User-defined sensor-to-vehicle frame transformation
  • Easy integration via comprehensive SDK
  • Common protocol between 3DM-GX3, GX4, RQ1, GQ4, GX5, and CV5

    Cost Effective

  • Out-of-the box solution reduces development time
  • High performance tactical grade outputs at an industrial grade price


Integrated sensors

Triaxial accelerometer, triaxial gyroscope, triaxial magnetometer, temperature sensors, pressure altimeter, and GPS receiver

Data outputs

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

Computed outputs:

Extended Kalman Filter (EKF): filter status, GPS timestamp, 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. Complementary Filter (CF): attitude estimates (in Euler angles, quaternion, orientation matrix), stabilized north and gravity vectors, GPS correlation timestamp

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

300°/sec (standard)

±75, ±150, ±900°/sec (options)

±2.5 Gauss


±0.03 % fs

±0.03 % fs

±0.4 % fs


<0.04 mg



Bias instability

±0.02 mg



Initial bias error

±0.001 g

±0.05°/sec ±0.003 Gauss

Scale factor stability

±0.05 %

±0.05 %

±0.1 %

Noise density

50 µg/Hz


100 µGauss/Hz

Alignment error


±0.05° ±0.05°

Adjustable bandwidth

250 Hz (max)

160 Hz (max) --

IMU filtering

4 stage filtering: analog bandwidth filter to digital sigma- delta wide band anti-aliasing filter to (user adjustable) digital averaging filter sampled at 8 kHz and scaled into physical units; 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

Pressure Altimeter


-1800 m to 10,000 m


< 0.1 m

Noise density

0.01 hPa RMS

Sampling rate

25 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°


0.1° (typ)

Calculation update rate

500 Hz

Computed data output rate

1 Hz to 500 Hz

Global Navigation Satellite System (GNSS) Outputs

Receiver type

72-channel GPS/QZSS L1 C/A, GLONASS L10F, BeiDou B1, SBAS L1 C/A:WAAS, EGNOS, MSAS Galileo-ready E1B/C

GNSS data output rate

1 Hz to 4 Hz


Cold start: 27 sec, reacquisition: 1 sec hot start: <1 sec


Tracking: -164 dBm, cold start: -147 dBm, hot start: -156 dBm

Velocity accuracy

0.1 m/sec

Heading accuracy


Horizontal position accuracy

GNSS: 2.5 m CEP (autonomous)

SBAS: 2.0 m CEP (stationary, 24 hours, SEP 3.5 m)

Time pulse signal accuracy

30 nsec RMS

< 60 nsec 99%

Acceleration limit

≤ g

Altitude limit

No limit

Velocity limit

500 m/sec (972 knots)

Operating Parameters


USB 2.0 (full speed)

RS232 (9,600 bps to 921,600 bps, default 115,200)

Power source

+ 4.2 to + 28 V dc

Power consumption

2.5 W (-40 °C to +85 °C)

Operating temperature

-40 °C to +85 °C

Vibration limit

RMS, 10 Hz to2 kHz

Mechanical shock limit

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

Physical Specifications


79 mm x 77 mm x 23 mm


105 grams

Enclosure material


Regulatory compliance




Data/power output: micro-DB9

GPS antenna: MMCX type


MIP™ Monitor, MIP™ Hard and Soft Iron Calibration, Windows XP/Vista/7/8 compatible


Common protocol between 3DM-GX3, GX4, RQ1, GQ4, GX5, and CV5

Software development kit (SDK)

MIP™ data communications protocol with sample code available (OS and computing platform independent)


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