From Space, All Eyes on North Korea
While North Korea is largely inaccessible to the rest of the world, satellite images, particularly of its missile sites, have helped analysts keep close tabs on the country’s activities.
Two satellite companies, GeoEye and DigitalGlobe, say that interest in Musudan-ri, a North Korean launch site, has been at a fever pitch in recent weeks.
Their satellites are in orbit, taking photographs of spots on the globe as frequently as daily, depending on customer demand. Some can capture objects as small as home plate on a baseball diamond in their photos.