North Korea's first spy satellite is "alive", space experts say, after detecting changes in its orbit that suggest Pyongyang is successfully controlling the spacecraft - although its capabilities remain unknown.
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After two fiery failures, North Korea successfully launched the Malligyong-1 satellite into orbit in November. Pyongyang's state media claimed it has photographed sensitive military and political sites in South Korea, the United States and elsewhere, but has not released any imagery. Independent radio trackers have not detected signals from the satellite.
"But now we can definitely say the satellite is alive," Marco Langbroek, a satellite expert at Delft University of Technology in the Netherlands, wrote in a blog post.
From February 19-24, the satellite conducted manoeuvres to raise its perigee, or the lowest point in its orbit, to 497km from 488km, Langbroek said, citing data from the US-led Combined Space Operations Centre.
"The manoeuvre proves that Malligyong-1 is not dead, and that North-Korea has control over the satellite - something that was disputed," he said.
South Korea's Defence Ministry said it too had assessed that the satellite was in orbit, but said it would not comment further on individual analyses. On Monday, Defence Minister Shin Won-sik said the satellite was not showing any signs of performing other tasks or engaging in reconnaissance.
"While we indeed currently cannot be sure whether the satellite does successfully take imagery, it at least performs orbital manoeuvres, so in that sense it is functional," Langbroek wrote of Shin's comments.
The orbit-raising manoeuvre was a surprise as the presence of an onboard propulsion system was unexpected and previous North Korean satellites never manoeuvred, he said.
"Having the capacity to raise the satellite's orbit is a big deal," Langbroek said.
That meant that as long as there was fuel in the satellite, North Korea could prolong the satellite's lifetime by raising its altitude when it got too low because of orbital decay, he concluded.
The United States, Russia and China, the world's top space powers, have in recent years launched satellites increasingly capable of manoeuvring and inspecting other orbital objects as space grows as a critical arena for communications, commerce and military activity.
US Space Command, which tracks all active objects in orbit and sometimes assesses their function, did not immediately comment on the North Korean satellite.
Nuclear-armed North Korea has vowed to launch three more spy satellites in 2024.
Australian Associated Press
