Radar plots summarizing the criteria used to identify the most favorable star–planet system for SPI-induced radio observations among Tau Boo, HD 179949, and HD 189733 (from left to right). Each colored marker represents a specific criterion: detectable emission frequency above 10 MHz (black), orbital configuration (orange), radio-wave free escape (red), emission pattern variablity (yellow), recurrent emission (gray), maximum stellar elevation relative to each telescope (blue shades, light to dark: LOFAR, NenuFAR, SKA1-Low) and telescope sensitivity (green shades, light to dark: NenuFAR, SKA1-Low, LOFAR). Four concentric dashed circles represent increasing levels of favorability: no, not very, okay, and very.