RPW: Very low electric field measurements for LF bandwitdh (F<20MHz)

Embedding RPW (Radio Plasma Wave) instrument on Solar Orbiter implies to be able to measure very low level of the electric field from DC to 20MHz. And this low level is required either for RPW antenna calibration or for radiated emission qualification of the other units and instruments of the spacecraft. This document presents the steps in order to define an applicable setup. The first part of this document presents the context of the study and the levels to work with. The second part concerns the characterisations of the performances of the antenna. The last part presents the setups that allow achieving low level and the approach to do an estimation of the field expected in flight.