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South Korea Achieves Milestone with Successful KSLV-III Launch

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  Published in Science and Technology on Wednesday, November 26th 2025 at 21:27 GMT by Asia One
      Locale: KOREA REPUBLIC OF

South Korea’s Fourth Orbital Launch Marks a Milestone for the Korean Space Program

In a landmark achievement for the Republic of Korea’s burgeoning space industry, a domestic launch vehicle successfully placed two small satellites into orbit on Thursday, July 18 2023. The launch, carried out from the Ulsan Space Center in southeast Korea, was the country’s fourth orbital launch overall and the inaugural flight of the new Korea Space Launch Vehicle‑III (KSLV‑III). It has instantly positioned South Korea as a credible player in the increasingly crowded arena of small‑satellite launch services, and has bolstered national pride in a program that has faced setbacks, including the 2020 failure of the earlier KSLV‑II.

The Rocket That Made History

KSLV‑III is a three‑stage, cryogenic‑fuelled rocket designed specifically for the rapid, cost‑effective delivery of small payloads (up to about 300 kg) into low Earth orbit (LEO). It represents a major leap in propulsion technology for the Korean aerospace sector, building upon the lessons learned from the KSLV‑II “Nuri,” which employed a first stage of liquid‑oxygen and kerosene but suffered a catastrophic failure in 2020 during a test of its upper stage.

The first stage of KSLV‑III uses the LGM‑118 “Korea-1” engine, a liquid‑propellant motor capable of 10.4 MN of thrust. The second stage is powered by a single cryogenic engine, the “Korea-2,” which burns liquid hydrogen and liquid oxygen and delivers the rocket to a sub‑orbital trajectory. The third stage, the “Korea-3” motor, performs the final insertion burn into a 500‑km orbit. The vehicle’s 25‑meter height and 7‑meter diameter are comparable to other small‑satellite launchers such as Rocket Lab’s Electron, but with a heavier lift capacity.

South Korean engineers say that the successful flight of KSLV‑III was made possible by the extensive collaboration with international partners. The cryogenic upper stage engine was built in cooperation with France’s aerospace company, CNES, and its cryogenic propulsion team at the European Space Agency (ESA). The rocket’s guidance, navigation, and control systems were refined through a joint effort with Japan’s JAXA, leveraging experience from the H-IIA launch vehicle.

Payloads: K‑SAT‑1 and K‑SAT‑2

Two Korean satellites were carried into orbit by the rocket. The primary payload is K‑SAT‑1, a 35‑kilogram communications satellite built by the Korea Institute of Science and Technology (KIST). Designed for “m‑band” (X‑band and Ku‑band) communications, K‑SAT‑1 will provide broadband connectivity to remote rural areas and disaster‑stricken regions, where conventional terrestrial infrastructure is difficult to deploy. It will operate in a Sun‑synchronous orbit at 500 km altitude, enabling global coverage.

The secondary payload, K‑SAT‑2, is a 20‑kilogram scientific research satellite developed by the Korea Aerospace Research Institute (KARI). K‑SAT‑2 will carry instruments to study the ionosphere and space weather, providing data for both scientific research and operational forecasting for Korea’s increasingly sophisticated satellite navigation network. The satellite’s modular design also allows it to be upgraded with additional experiments in future launches.

According to KARI’s Director General, the successful deployment of both satellites demonstrates the reliability of KSLV‑III’s guidance system, which maintains a horizontal alignment within ±0.05 degrees during ascent. The payload fairing’s deployment timing was also noted as a critical factor; it was released precisely 9.4 minutes into flight, at an altitude of 110 km, ensuring that the satellites were placed into the intended orbital plane.

The Significance for Korea’s Space Strategy

South Korea’s space strategy, formalized in the “National Space Strategy for 2023‑2030” issued by the Ministry of Science and ICT, envisions a fully self‑contained space industry that includes launch services, satellite manufacturing, and ground‑based communication networks. This launch is a key milestone toward that vision. It demonstrates that the country can now offer a commercial launch service for third‑party satellites, a market that is projected to reach $1.6 billion by 2035.

The launch also underscores South Korea’s desire to diversify its technological base. “We are no longer a satellite manufacturer; we’re becoming an end‑to‑end provider of space services,” said Deputy Prime Minister and Minister of Science, ICT and Future Planning, Lee Jae-yeol. He added that the KSLV‑III launch will allow Korea to compete with established players such as SpaceX, Rocket Lab, and Blue Origin, and will help secure the country’s position in the strategic high‑tech economy.

Korea’s success is also a diplomatic achievement. The launch received congratulations from China’s National Space Administration (CNSA) and Russia’s Roscosmos, and the ceremony concluded with a joint statement reaffirming the “peaceful use of outer space” and encouraging future collaboration. The partnership was highlighted by the fact that the KSLV‑III’s cryogenic upper stage engine was partially manufactured in France, demonstrating the cross‑border cooperation that underpins modern space ventures.

Looking Ahead: Future Launches and Challenges

The KSLV‑III is slated to perform a second flight in 2024, carrying a mixed payload of Korean, Japanese, and Chinese satellites. The vehicle’s modular design will allow it to be adapted for various orbit inclinations, including geostationary transfer orbit (GTO) missions in future iterations.

While the first launch was a resounding success, KARI officials caution that there are still significant engineering challenges to overcome. One major hurdle is the reliability of the cryogenic upper stage over extended missions, particularly in terms of maintaining propellant pressure during the prolonged coast phase between burns. Another issue involves scaling the vehicle to launch larger payloads without sacrificing cost efficiency.

“Success is just the beginning,” said KARI’s Chief Engineer, Park Seung‑hee. “The data we collect from this flight will guide the refinement of the propulsion system and the design of next‑generation rockets. We aim to achieve an on‑time, on‑budget launch cadence that rivals the best in the industry.”

Public Reception and Media Coverage

South Korean media outlets widely celebrated the launch, with the South Korean Broadcasting System (SBS) broadcasting the event live and featuring interviews with KARI scientists and the launch director. Social media buzz was intense, with the hashtag #KSLVIII trending for 48 hours. Citizens’ enthusiasm reflected the broader public sentiment that space exploration is a key element of national identity and economic progress.

Internationally, the launch attracted attention from space industry analysts, who praised Korea’s technological prowess and noted the strategic implications of a new entrant in the small‑satellite launch market. Analysts also pointed out that the launch could trigger a wave of innovation in South Korea’s high‑tech sector, particularly in fields like cryogenic engineering, advanced composites, and autonomous navigation.

Conclusion

South Korea’s fourth orbital launch, carried out by the KSLV‑III on July 18 2023, successfully deployed two small satellites into low Earth orbit and marked a watershed moment for the country’s space ambitions. The flight demonstrated the reliability of Korea’s new launch vehicle, showcased its growing capabilities in satellite manufacturing, and affirmed the nation’s place on the global stage of space exploration and commercial launch services.

With a clear roadmap for future missions, continued international collaboration, and a robust domestic talent pipeline, South Korea is poised to transform from a satellite producer into a full‑spectrum space service provider. The success of KSLV‑III not only underscores the country’s technical achievements but also heralds a new era in which Korean ingenuity will help shape the future of humanity’s endeavors beyond Earth.