On-ground performance tests of GRBM detectors

In this section we briefly describe the calibrations performed on GRBM crystal detectors before and after their integration in the PDS assembly. Although the reconstruction of the actually used response matrices of LS1 and LS3 is mainly based on the calibrations with the integrated satellite described in next section, some of the information on detectors performances obtained with these calibrations has been already accounted for and will be very extensively used in upgrading response reconstruction with Monte Carlo simulations results.