KTV 정책다큐 전환 15화 : D-26 누리호, 뉴 스페이스를 열다

Summary

The documentary presents Nuri (KSLV-II) as South Korea’s independently developed space launch vehicle. It examines how repeated launches could help shift the country’s space program from government-led development toward a commercial New Space industry.

Development and launch sovereignty

Nuri took about 13 years to develop, beginning in 2010. Unlike Naro, whose first stage was imported from Russia and whose second stage was developed in Korea, Nuri was developed using domestic technology.

The program builds on earlier Korean scientific rockets. The KSR series began in the 1990s, and KSR-3 was the first Korean scientific rocket to use a liquid-fuel engine. The documentary describes independent launch capability as launch sovereignty: the ability to place satellites or cargo into orbit on a schedule set by the country itself. It also states that, at the time discussed, only seven countries could independently launch practical satellites weighing more than one tonne.

Engineering and reliability

Spaceflight presents engineering challenges unlike those on Earth. Space is a vacuum, with extreme temperature differences and radiation, so launch vehicles and satellites require extensive testing to reduce the risk of failure.

Rocket-engine development is particularly difficult. The documentary identifies combustion instability as a major challenge and describes how the team informally celebrated a successful early engine test as “Engine Independence Day.”

Repeated Nuri launches are intended to demonstrate reliability as well as deliver payloads. The fifth launch is described as carrying five small satellites toward an orbit approximately 570 km above Earth. A key success criterion is whether the satellites separate into their intended orbits. Their planned work includes Earth observation and a biological experiment in the space environment.

The documentary also describes a broader constellation plan: 11 satellites expected by 2027, intended to observe multiple locations and capture events more frequently. The subtitles give the planned imaging resolutions as 4 m in monochrome and 1 m in color.

Launch preparation and operations

A launch involves many teams and systems, including vehicle assembly, engine and propulsion work, launch-pad inspections, weather monitoring, telemetry, control-room operations, and coordination with other agencies.

Nuri’s assembly is described as taking about a year. The vehicle is then transferred to the launch site, positioned vertically, and loaded with liquid oxygen and kerosene. During flight, telemetry radio links provide ground teams with vehicle information after wired connections are lost.

The documentary describes the mission process as follows:

1. Assemble the vehicle, inspect launch facilities and equipment, monitor weather, and coordinate launch operations.
2. Move Nuri to the pad, raise it vertically, load propellants, ignite the engines, and lift off.
3. Track the vehicle through telemetry and release payloads into their target orbit.
4. Carry out activities such as Earth observation, communications, or biological experiments.

New Space and commercial opportunities

The documentary describes New Space as the expansion of space from a domain dominated by governments and national competition into a commercial market. SpaceX’s recovery and reuse of launch vehicles is presented as an example of how reusability can reduce costs and increase access to space.

Other commercial opportunities include satellite communications in remote areas and services based on Earth-observation imagery. For example, AI could be used to estimate business activity from container traffic at ports.

The speakers argue that public investment in launch sites and large test facilities, alongside participation from private companies and universities, could help build the industry. They also describe a technology-transfer effort intended to enable private companies to manufacture Nuri and eventually improve its design.

South Korea’s space-sector strengths

South Korea’s existing strengths include Earth-observation satellites, including synthetic-aperture radar, and high-resolution imaging. The documentary also points to possible synergies with the country’s semiconductor and telecommunications sectors.

It argues that public research, private companies, and government support each have a role in developing the industry. Private firms are moving toward integrated services spanning satellite and launch-vehicle development, data services, and space-related applications.

Researchers and sources featured

• Park Jong-chan — Identified in the subtitles as a launch-vehicle researcher at the Korea Aerospace Research Institute (KARI), director of the Korea Launch Vehicle Advancement Project Group, and a launch manager for the fourth Nuri launch.
• Yonghyun Park — Identified as a team leader in the Space Business Development Team at “Kai”; the organization name is unclear in the auto-generated subtitles.
• Anna Gyun — Identified in the subtitles as working at KARI; the name may be inaccurately transcribed.
• Korea Aerospace Research Institute (KARI) — Discussed as a central participant in launch-vehicle and satellite development.
• KAIST Satellite Research Center — Identified as the developer of the small satellites discussed for the fifth launch.
• SpaceX — Cited as an example of reusable launch vehicles and commercial satellite services, including Starlink.