Inertial Measurement System DMS-SGP02 Two Antenna GPS

The DMS-SGP02 is equipped with a dual antenna GPS system, so it provides a GPS heading reference signal even while the unit is stationary.


  • Solid State, Strapdown System
  • GPS Heading Reference
  • Latitude, Longitude, Altitude Output
  • Low Cost
  • Rugged, High Reliability
  • Vibration Resistant
  • Analog and RS-232 Serial Outputs
  • One Year Limited Warranty
  • Engineering Support

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The DMS-SGP02 is a miniaturized version of the DMS-EGP02. To allow for a smaller package, the DMS-SGP02 uses our S series MEMS rate gyro.

The DMS may be used in almost any application where triaxial angular rate and acceleration data is required. This inertial sensor provides both angular rate and acceleration outputs in analog and digital formats. The DMS features six accelerometer outputs. The X, Y, and Z axis outputs represent the accelerations in the plane of the vehicle body, while the second set of three outputs measure the acceleration aligned with an earth-level coordinate system. This allows forward and lateral acceleration measurements that are essentially free of gravity influences. The triaxial sensor set allows software alignment of sensors, greatly reducing any alignment errors. The serial interface is highly configurable and provides access to almost all operational parameters.

The DMS-SGP02 is designed for vehicle applications where accurate heading is required, but a magnetic compass is infeasible. This sensor is equipped with a dual GPS antenna system that provides heading data even when the vehicle is not is motion. The addition of the GPS antennas also gives vehicle velocity data to the DMS which enhances the unit’s performance during highly dynamic maneuvers such as sharp turns. This makes the DMS-SGP02 inertial gyro sensor a more complete system since it does not require velocity information to be supplied from an external sensor.

The DMS-SGP02 is useful in automotive testing, vehicle dynamics, and marine applications. This sensor can be used as a replacement for the discontinued Watson IMU-E604, and is most useful in applications where strong magnetic fields make heading data from a fluxgate magnetometer unreliable.



Range: Bank ±180°
Range: Elevation ±90°
Resolution: 0.02° Binary mode (14 bit)
Analog Scale Factor: 18°/V ±10V Bank
±5V Elevation
Accuracy: Static ±0.5°
* Accuracy: Dynamic 2%

GPS Heading

Range: 0° – 360°
Resolution: 0.02° Binary mode (14 bit)
Analog Scale Factor: 18°/V ±10V Output
Accuracy: Static 0.5° Based on antenna spacing. See figure 1
* Accuracy: Dynamic or Relative 2% ±0.1°/sec (without GPS)

Angular Rate

Range: Roll, Pitch, Yaw ±100°/sec
Resolution: 0.025°/sec Binary mode (14 bit)
Analog Scale Factor: 10°/sec/V ±10V Output
Scale Factor Accuracy: 2%
Bias: Roll, Pitch, Yaw < 0.3°/sec
Non-Linearity: < 0.05% Full scale range
Bandwidth: 20 Hz


Range: X, Y, Z ±10g
Range: Forward, Lateral, Vertical ±10g
Resolution: 4mg
Analog Scale Factor: 1g/V ±10V Output
Scale Factor Accuracy: 1%
Bias: X, Y, Z < 10mg
Non-Linearity: 0.1% Full scale range
Bandwidth: 3 Hz

GPS Positioning

Range: Latitude ±90°
Range: Longitude ±180°
Range: Altitude 0ft to 21500ft
Resolution: Latitude, Longitude 0.0000013° Binary mode (28 bit)
Resolution: Altitude 2 ft Settable: Above mean sea level or GPS Geodetic Corrected
Accuracy: Latitude, Longitude ±0.6m (with DGPS) ±2.5m (without DGPS)


Temperature: Operating -40°C to 85°C
Temperature: Storage -55°C to 85°C
Vibration: Operating 2.5g rms 20 Hz to 2 KHz
Vibration: Survival 10g rms 20 Hz to 2 KHz
Shock: Survival 500g 10mS ½ sine wave


Frame Rate: 71.1 Hz Maximum
Startup Time: Data 5 sec
Startup Time: Satellite acquisition 5 min Typical
Input Power: 10 to 35VDC 4.9W
Input Current: 410mA @ 12VDC 205mA @ 24VDC
Input Velocity: (Optional) ±10VDC Full scale (±400kph)
Digital Output: RS-232
Analog Output: ±10VDC
Analog Output Impedance: 300 Ohm Per line


Axis Alignment: < 0.25°
Size: Including Mounting Flanges 3.24″W x 5.78″L x 3.50″H 8.2 x 14.7 x 8.9 (cm)
Weight: 31 oz (1.9 lb) 879 grams (0.9 Kg)
Connection: RS-232 9 pin female “D” subminiature
Connection: Power / Analog Outputs 25 pin male “D” subminiature
Connection: Antenna (Qty 2) SMA Antenna cable length: 3.0m
* Using velocity data with GPS mode on.
Actual accuracy can be calculated as the listed percentage multiplied by the change in value over the entire dynamic maneuver.
Acquisition time for GPS units is typical for the contiguous United States. Acquisition time may differ due to interference in your geographic area.
Specifications are subject to change without notice.
This product may be subject to export restrictions. Export Classification ECCN 7A994.



Title File Type
DMS-SGP02 Spec Sheet pdf Download
DMS-SGP02 Owner’s Manual pdf Download