GPS Compass Magnetometer GCM-360

Featuring dual antenna GPS and a fluxgate magnetometer, the GCM-360 is the ideal tool for mapping local magnetic fields and geological surveys.


  • Solid State, Strapdown System
  • GPS Heading Reference
  • Latitude & Longitude Output
  • Rugged, High Reliability
  • Vibration Resistant
  • PC Heading Calibration
  • Two Year Limited Warranty
  • Engineering Support

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The GCM-360 is a unique product for defining the magnetic field of the earth. This unit provides heading, GPS coordinates and sensor information. It includes a high accuracy triaxial fluxgate magnetometer and a triaxial accelerometer. This sensor is equipped with a dual antenna GPS system that provides heading data even when not in motion. This unit will output several data items including GPS true north heading, latitude, longitude, magnetic heading, X, Y, and Z axis magnetic field. An antenna spacing of 0.500 meters ±5mm is required. The “fore” antenna is placed 0.5 meter ahead of the “aft” antenna on a line parallel to the x axis of the sensor package.



Range: Bank ±180°
Range: Elevation ±90°
Resolution: 0.02° Binary mode (14 bit)
Accuracy: Static ±0.5°

Magnetic Heading

Range: 0° – 360°
Resolution: 0.02° Binary mode (14 bit)
* Accuracy: Static ±1.5° Dependant on Magnetic Latitude

GPS Heading

Range: 0° – 360°
Resolution: 0.02° Binary mode (14 bit)
Accuracy: Static ±0.5° Using GPS
0.5 m antenna spacing)


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


Range: X, Y, Z ±1000 mGauss
Resolution: 0.1 mGauss Binary mode (14 bit)
Scale Factor Accuracy: 1%
Bias: X, Y, Z < 5 mGauss
Non-Linearity: < 0.01% Full scale range
Bandwidth: 10 Hz

GPS Positioning

Range: Latitude ±90°
Range: Longitude ±180°
Resolution: Lat, Long 0.0000013° Binary mode (28 bit)
Accuracy: Lat, Long ±0.6 m (with DGPS) ±2.5 m (without DGPS)


Temperature: Operating -30°C to 70°C
Temperature: Storage -40°C to 85°C
Vibration: Operating 5 g rms 20 Hz to 2 KHz
Vibration: Survival 10 g rms 20 Hz to 2 KHz
Shock: Survival 500g 10mS ½ sine wave


Frame Rate: 284.44 Hz Maximum
Startup Time: Data 5 sec
Startup Time:
Satellite acquisition
5 min Typical
Input Power: 10 to 35 VDC 5.3 W
Input Current: 420 mA @ 12 VDC 220 mA @ 24 VDC
Digital Output: RS-232


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: 30 oz (1.9 lb) 850 grams (0.9 Kg)
Connection: RS-232 9 pin female “D” subminiature
Connection: Power 9 pin male “D” subminiature
Connection: Antenna (Qty 2) SMA Antenna cable length: 3.0 m
* Static heading accuracy is dependent on the magnetic environment. This sensor will meet or exceed this spec within the 48 contiguous United States.
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. Please consult the factory.



Title File Type
GCM-360 Spec Sheet pdf Download
GCM-360 Owner’s Manual pdf Download