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GPS Offset

The GPS Offset block adjusts the IsoLOG 3D DF antenna position in relation to the GNSS Compass GPS readout.

GPS Offset block

Left hand side Input:

  • GPS
  • GNSS

Right hand side Output:

  • GPS
  • DDCC (Connect to DDCC block)


If setting up a test drive vehicle you need to adjust the position of the IsoLOG 3D DF antenna since it is not the same as the GNSS Compass position (which feeds the GPS position to the complete system). This is what the GPS Offset block is made for. You can add an offset of Latitude and Logitude but also Altitude and Azimuth which will offer you a perfect position setup.

The setup is quite simple and only needs the offset data in relation to the GNSS Compass unit:

GPS Offset block setup


A typical mission:

GPS Offset typical mission