North Korea told Japan's Coast Guard that the launch would fly over the Yellow Sea, East China Sea and the Pacific, areas that Japan said are outside its exclusive economic zone.

The military last month recovered parts of the rocket used in the North's failed launch of its first military satellite, after the booster and payload crashed into the sea soon after takeoff.

Roughly two-thirds of Indonesia's 280 million population already use the internet, but connectivity is limited in far-flung, underdeveloped eastern islands of the Southeast Asian country.

North Korea also vows to continue developing its nuclear capability and to strengthen solidarity with other countries that oppose the 'US strategy for world supremacy'.

In a rare admission of a North Korean setback, reports that the Chollima-1 rocket, carrying a military reconnaissance satellite known as 'Malligyong-1', crashed into the sea after an accident.

The flight was supposed to put North Korea's first spy satellite in orbit.

The nuclear-armed North says it has completed its first military spy satellite and leader Kim Jong Un has approved final preparations for the launch.

Analysts say the military satellite is part of nuclear-armed North Korea's efforts to advance surveillance technology, including drones, to improve its ability to strike targets in the event of a conflict.

Some other decisions meanwhile have been put on hold.

The first signal was received at 6.41am, seven minutes after its separation from the rocket.

The satellite, scheduled for launch on June 23, is expected to significantly improve the country’s internet services and speeds, especially in rural areas.

The computer-aided simulations included potential shooting down of US missile-tracking satellites, satellite jamming, and other electronic warfare 'effects' that are possible tactics in space warfare.