Side-looking (2D3D) Vectrino Coordinate System

This PDF drawing provides the XYZ (positive) coordinate system for the side-looking (2D3D) Vectrino probe.  

The Vectrino software provides estimates of Z1 and Z2.  These are independent measurements of the vertical velocity for the standard downward looking probe.  The side-looking probe does not have a secondary measurement of the vertical velocity.  Z1 will be the correct vertical velocity.  Z2 should be output as zero.

Best regards,
Eric