•CME core: optically thick at all FASR frequencies, but can be imaged only at higher frequencies because of the low brightness temperature
•CME frontal: can be easily observed in meterwaves if the nonthermal emission is not too strong. In microwaves behind-the-limb high density CMEs can be imaged.
•Nonthermal emission from electrons trapped in CME substructures can be a good source of information
•Filaments & filament Cavities on the disk à CME source regions