North Korea could be ready to test-fire a missile within days as satellite imagery has shown increased activity at a missile site over the past 48 hours, a defense weekly said. A significant increase in launch preparations has occurred at the Musudan-ni missile site on the communist country's northeastern coast, said Joseph S. Bermudez Jr., a senior analyst at Jane's Information Group who specializes in North Korean defense and intelligence matters. The latest satellite images indicate that North Korea is preparing to launch either a prototype Taepodong 2 intermediate range ballistic missile or a Paektusan 2 space launch vehicle within a matter of days,'' Jane's Defence Weekly said in a report issued Friday in London.