Configure a Dual GPS Movement Sensor

The dual-gps-rtk model of movement sensor calculates a compass heading from two GPS movement sensors, and returns the midpoint position between the first and second GPS devices as its position. In addition to GetCompassHeading(), this model provides data for GetPosition() and GetAccuracy().

{
  "components": [
    {
      "name": "your-dual-gps-rtk",
      "model": "dual-gps-rtk",
      "type": "movement_sensor",
      "namespace": "rdk",
      "attributes": {
        "first_gps": "<name-of-your-first-gps-movement-sensor>",
        "second_gps": "<name-of-your-second-gps-movement-sensor>",
        "offset_degrees": <int>
      },
      "depends_on": []
    }
  ]
}

{
  "components": [
    {
      "name": "your-dual-gps-rtk",
      "model": "dual-gps-rtk",
      "type": "movement_sensor",
      "namespace": "rdk",
      "attributes": {
        "first_gps": "nmea-1",
        "second_gps": "nmea-2",
        "offset_degrees": 90
      },
      "depends_on": []
    }
  ]
}

The following attributes are available for a dual-gps-rtk movement sensor:

Name	Type	Required?	Description
first_gps	int	Required	The name you have configured for the first movement sensor you want to combine the measurements from. Must be a GPS model.
second_gps	string	Required	The name you have configured for the second movement sensor you want to combine the measurements from. Must be a GPS model.
offset_degrees	int	Optional	The value to offset the compass heading calculation between the two GPS devices based on their positions on the base. Calculate this as the degrees between the vector from first_gps to second_gps and the vector from the vehicle’s back to the vehicle’s front, counterclockwise. Default: 90

Test the movement sensor

After you configure your movement sensor, navigate to the Control tab and select the dedicated movement sensor dropdown panel. This panel presents the data collected by the movement sensor. The sections in the panel include the position, compass heading, and accuracy.

Next steps

For more configuration and development info, see: