North Korea is really working hard to legitimize their missile test:

North Korea has informed international agencies it is going to launch a satellite in April. The North informed the International Civil Aviation Organization and the International Maritime Organization “of data necessary for the safe flight and navigation of aircraft and vessels in accordance with relevant regulations as part of preparations to launch the Kwangmyongsong-2, an experimental communications satellite, by means of delivery rocket Unha-2,” the official [North] Korea Central News Agency said Thursday.

South Korea’s Yonhap news agency quoted a North Korea expert as saying Pyongyang “announced a plan to launch the projectile between April 4 and 8.” “We have received a letter and it contains dates, times and coordinates,” IMO spokesman Lee Adamson told the BBC, confirming the dates.  [Chosun Ilbo]

It will be interesting to see what happens considering the Japanese consider even a satellite launch a violation of UN sanctions and have vowed to shoot the missile out of the sky.