DENVER – South Korea’s Hancom InSpace is expanding its Earth-observation constellation with Sejong-3, a cubesat with a hyperspectral sensor, launched in March on a SpaceX Transporter rideshare and currently undergoing commissioning.
“Sejong-3 is an important addition to our Sejong constellation because it brings hyperspectral capability alongside the multispectral imaging already provided by Sejong-2 and Sejong-4,” Seeung-chan “Wesley” Heo, Hancom InSpace overseas business manager, told <em>SpaceNews. “This supports a broader range of Earth observation applications such as vegetation monitoring, mineral monitoring, soil observations, and environmental analysis.”
Hancom InSpace, a spinoff of the Korea Aerospace Research Institute was acquired in 2020 by South Korean technology conglomerate Hancom Group to fuse space and airborne data for decision-support services.
Sejong-1, launched in 2022, Sejong-2, launched in June 2025, and Sejong-3, were jointly developed by Hancom InSpace and Spire Global. Sejong-4, an electro-optical satellite, was designed, developed and integrated in-house.
South Korea’s Nuri Korean Space Launch Vehicle sent Sejong-4 into low-Earth orbit in November.
Hancom InSpace is in the early stage of development of Sejong-5, a satellite that may be equipped with a chip-scale atomic clock.
Hancom InSpace plans “to continue expanding the Sejong series in order to provide Earth observation data more frequently and precisely, strengthening our overall service capabilities, Heo said.