Lord MicroStrain 3DM-CX5 Series, User Manual

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3DM-CX5-GNSS/INS
User Manual
23
4.3.3 Sensor Frame
The sensor frame is indicated on the top of the device and is oriented such that the x-axis vector is
parallel with the long side of the sensor and points toward the sensor connector, the y-axis is 90° to
the right of the x-axis, and the z-axis goes through the bottom of the sensor (outward). These axes
were selected so that when the connector on the device is pointed north and the device is upright
and level, the sensor frame will match the NED frame exactly, giving zero rotation.
The 3DM-CX5-GNSS/INS reports acceleration, angular rate, delta- theta, delta- velocity, inertial
sensor biases and corrections in this frame. When no sensor-to-platform frame transformation has
been provided (
see Platform Frame on page 32
).
The orientation of the sensor frame with respect to the local NED frame can be viewed in the
MIP Monitor software at: View > 3D Attitude menu. This window displays the orientation of the
sensor in relationship to north and shows measurement origination for acceleration and angular
rate. The view can be rotated for clicking, holding, and dragging the image. Options for true north
and magnetic north geo- references are available through the magnetic declination correction
setting at: Device Settings > EF settings > Geographic.
Refer to the 3DM-CX5-GNSS/INS dimensional diagram for the location of the measurement
origin (
see Sensor Dimensions and Origin on page 69
).
Figure 19. Sensor Frame