The Solar X-Ray MOONitor (SXRM) a lunar-based Sun activity monitor

The Solar X-Rays MOONitor is a project aimed at demonstrating the feasibility and the technological maturity of a lunar-based space weather monitor relying on a commercially available sensor. The results of a test campaign performed in favor of an analogous instrument (SolarX) demonstrated an energy resolution suitable to assess the solar corona plasma temperatures and energies. Next activities are oriented to realize a Digital Pulse Processor readout electronics implemented in such a way that, in the future, it can be built with space-qualified components. The system shall be able to manage flux variations of several orders of magnitude to deal with the extreme Sun conditions: from quiet to the most energetic class-X flares. Beside this, an activity to identify which are the possible signatures of solar events is on-going. This paper reports the current and the planned activities to implement the sensor's readout functions in an FPGA-based space-ready electronics.