HANCOM InSpace, an artificial intelligence (AI) data analysis company within the HANCOM Group, said on the 17th that its self-developed nanosatellite "Sejong-4" will be launched aboard Nuri's fourth launch on the 27th.
"Sejong-4" is equipped with the real-time operating system (OS) "NEOS RTOS" and the flight software (FSW) developed in-house by HANCOM InSpace. The company will integrate and operate in the extreme environment of space the OS that serves as the core brain running the onboard computer (OBC) and the flight software responsible for attitude control and mission execution to verify its technical capabilities. The satellite is also equipped with domestically produced hardware such as solar panels and a structure.
"Sejong-4" is a 6U-class (200×100×340 mm, about 7.6 kg) nanosatellite tasked with capturing 5-meter-class multispectral images in low Earth orbit at an altitude of 600 km. It orbits the Earth once approximately every 90 minutes, enabling 14–16 observations per day.
HANCOM InSpace fuses the imagery secured through the "Sejong satellite" series with heterogeneous data such as drones and ground sensors for real-time analysis on its integrated platform "InStation." Leveraging the platform's AI-based multi-INT engine "Janus" and MLOps technology with auto-learning and deployment functions, it provides high value-added data services in a wide range of fields, including ▲ agriculture, forestry, and land change monitoring ▲ disaster detection ▲ defense surveillance ▲ industrial safety monitoring. This technology is already being used in about 100 projects at home and abroad.
HANCOM InSpace has successfully operated "Sejong-1" in 2022 and "Sejong-2" in 2025, accumulating capabilities in satellite development and operations. "Sejong-4" is a core component of the constellation satellite (ConSat) system that HANCOM is pursuing, with plans to significantly increase the density and frequency of data collection through multiple satellites.
"Sejong-4" completed preliminary registration as a space object in May and was delivered to the Naro Space Center on Oct. 31, with loading into the launch canister for Nuri's fourth launch completed on the 3rd of this month. HANCOM InSpace plans to launch "Sejong-3," equipped with a hyperspectral camera with 442 bands, on a SpaceX Falcon 9 rocket in February next year.
Choi Myeong-jin, CEO of HANCOM InSpace, said, "The launch of 'Sejong-4' will be an important milestone in demonstrating HANCOM InSpace's satellite development technology and system integration capabilities in space," adding, "Based on the technologies we have secured, we will strengthen the value chain from satellite development to operations and data analysis, and leap forward as a data intelligence corporation."