North Korea announced Saturday that it would attempt to launch a long-range rocket in mid-December, a defiant move just eight months after a failed April bid was widely condemned as a violation of a U.N. ban against developing its nuclear and missile programs.

The launch, set for Dec. 10 to 22, is likely to heighten already strained tensions with Washington and Seoul as the United States prepares for Barack Obama’s second term as U.S. president and South Korea holds its own presidential election on Dec. 19. …

A spokesman for North Korea’s Korean Committee for Space Technology said scientists have “analyzed the mistakes” made in the failed April launch and improved the precision of its Unha rocket and Kwangmyongsong satellite, according to the official Korean Central News Agency.