Issue 92

Space Review Article: North Korean Satellite Ops

4 Mar: Article from the Marco Langbroek examing the orbital maneuvers North Korea's first military reconnaissance satellite, the Malligyong 1. After the 21 Nov 2023 launch, initial western responses were skeptical, stating that the satellite, although it successfully reached orbit, was nevertheless non-functional…

4 Mar: Article from the Marco Langbroek examing the orbital maneuvers North Korea’s first military reconnaissance satellite, the Malligyong 1. After the 21 Nov 2023 launch, initial western responses were skeptical, stating that the satellite, although it successfully reached orbit, was nevertheless non-functional. However, starting on 19 Feb, Malligyong-1 began showing unambiguous signs of life. From 19-24 Feb 2024, the satellite performed five consecutive small orbit raising maneuvers, one each day. Excerpts Below.

– The series of small maneuvers raised the perigee altitude (the lowest point in its elliptical orbit) by nine kilometers, from 488 to 497 kilometers…in doing so it also circularized its orbit.

– The maneuvers also reduced the daily precession of the ascending node (which had been slightly growing over time) to a value closer to the ideal value of 0.986 degrees/day, in order to preserve the Sun-synchronous character of the orbit.

– Malligyong-1 maneuvering shows that the satellite is not “dead,” but functional—with the caveat that we do not know whether the onboard camera is actually taking images. Second, it underlines that the North Koreans have clear control over the satellite, including its attitude, and can modify its orbit. North Korea can now actively prolong the orbital lifetime of their satellites by doing periodic orbit raises.

This is the first time that a North Korean satellite has shown the ability to do orbital maneuvers.

Malligyong-1 Manevers 19-24 Feb24 (thespacereview.com)