  To better understand the radio signal emitted by extensive air-showers and to
further develop the radio detection technique of high-energy cosmic rays, the
LOPES experiment was reconfigured to LOPES-3D. LOPES-3D is able to measure all
three vectorial components of the electric field of radio emission from cosmic
ray air showers. The additional measurement of the vertical component ought to
increase the reconstruction accuracy of primary cosmic ray parameters like
direction and energy, provides an improved sensitivity to inclined showers, and
will help to validate simulation of the emission mechanisms in the atmosphere.
LOPES-3D will evaluate the feasibility of vectorial measurements for large
scale applications. In order to measure all three electric field components
directly, a tailor-made antenna type (tripoles) was deployed. The change of the
antenna type necessitated new pre-amplifiers and an overall recalibration. The
reconfiguration and the recalibration procedure are presented and the
operationality of LOPES-3D is demonstrated.
