In this paper the measurement uncertainty analysis of the radiating tests of the Hera-Juventas CubeSat performed in the indoor HERTZ facility at ESA/ESTEC are presented. The satellite is equipped with a ground penetrating radar mounting two half-wavelength dipoles working in the 50-70MHz band. The nominal lowest frequency of HERTZ is 400MHz hence, to cope with the degraded measurement accuracy at VHF, an ad-hoc measurement solution composed of several “key-components” has been implemented. The synthetic probe array technique, based on the field sampling at different positions generating a virtual array to reduce the illumination of the chamber walls, is the heart of implemented solution. Moreover, the quarter-wavelength averaging technique and the efficiency substitution method, along with RF transparent measurement equipment have also been considered.
