  LOPES 3D is able to measure all three components of the electric field vector
of the radio emission from air showers. This allows a better comparison with
emission models. The measurement of the vertical component increases the
sensitivity to inclined showers. By measuring all three components of the
electric field vector LOPES 3D demonstrates by how much the reconstruction
accuracy of primary cosmic ray parameters increases. Thus LOPES 3D evaluates
the usefulness of vectorial measurements for large scale applications.
