Abstract The BepiColombo Environment Radiation Monitor (BERM) is a housekeeping instrument onboard the BepiColombo mission, capable of measuring electron, proton, and heavy-ion fluxes. Due to its quasi-continuous data acquisition throughout all mission phases, BERM provides valuable contributions to both mission operations and scientific analysis of the space radiation environment. This study presents the calibration methodology applied to the electron and proton channels of BERM, along with its validation and cross-calibration with the solar intensity and X-ray spectrometer (SIXS), also onboard of BepiColombo mission. The bow–tie method was employed to calibrate each channel by determining its effective energy and geometric factor enabling the conversion of count rates into physical fluxes. The calibration validation with SIXS data of BERM proton channels P1 to P5 result in a mean deviation in the flux lower than 6%. BERM calibrated channels proved to be consistent with SIXS measurements, enhancing the relevance of BERM to the analysis of the space radiation environment, and in particular to Solar Energetic Particles (SEP) events.
Gomes et al. (Tue,) studied this question.