Solar Radio Spectrography: Comprehensive Diagnostics for Space Weather Applications

In the framework of Space Weather, the radiophysics of solar radio emissions provides key information on solar energetic processes, allows to estimate their direct geoeffectivity as radio interferences, and to use them as precursors and proxies of energetic particle events. In this framework, we briefly review the diagnostics by solar radio spectrography, emphasising the wealth of physical information that can be derived upon suitable working hypotheses.