South Korea ... t need a light source like the sun, so they can operate at night. They are impervious to weather conditions that can shroud optical satellite images. It is the fourth of five ...

South Korea’s Ganghwa County, whose closest point is just 1.8km (1.1 mile) from North Korea, is creating a noise map to help residents cope with blaring loudspeaker broadcasts from the North.

Unlike satellites that use optical cameras, SAR satellites don't need a light ... south, the newspaper reported. Seoul's "kill chain" strategy includes planning for preemptive attacks on North ...