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
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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 with the 3DM-GX3® , 3DM-GX4® and 3DM-RQ1™ sensor families for easy migration

    Cost Effective

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

    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

    ROHS, FCC Class B, CE



    Data/power output: micro-DB9

    GPS antenna: MMCX type


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


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

    Software development kit (SDK)

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


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