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Korea's first privately built observation satellite reaches orbit after four-year delay

Published: 03 May. 2026, 19:06 Updated: 03 May. 2026, 19:41

SEO JI-EUN
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Korea’s homegrown Earth observation satellite, the Compact Advanced Satellite 500-2 (CAS500-2), is launched into space on May 3, from the Vandenberg Space Force Base in California, United States. [SCREEN CAPTURE]

Korea's domestically developed Earth observation satellite lifted off from California early Sunday, reaching orbit after a nearly four-year delay caused by the fallout of the Russia-Ukraine war.

The Compact Advanced Satellite 500-2, or CAS500-2, was launched aboard a SpaceX Falcon 9 rocket from Vandenberg Space Force Base in California at midnight local time, according to the Korea AeroSpace Administration (KASA). A one-minute hold was called due to potential conjunction risks with other objects in orbit, but the mission otherwise proceeded without issue.

The satellite separated from the Falcon 9 about one hour after launch, successfully entering a sun-synchronous orbit at an altitude of 498 kilometers (309 miles). Fifteen minutes later, it established its first communication link with a ground station in Svalbard, Norway, confirming the spacecraft was in good health.

Korea Aerospace Industries (KAI) led the development and manufacturing of CAS500-2 — a first for a Korean mid-sized Earth observation satellite of this class.

KAI had previously worked alongside the state-run Korea Aerospace Research Institute as a joint design partner on the CAS500-1 project, which began in 2015. Through that collaboration, KAI absorbed the core technologies needed to develop the second unit independently.

"The successful launch of CAS500-2 is a major milestone that officially opens the 'new space' era in Korea," KASA Administrator Oh Tae-seok said following the launch.

The CAS500-2 weighs 534 kilograms (1177 pounds) and carries high-resolution optical sensors capable of capturing panchromatic imagery at 0.5-meter (1.6-foot) resolution and color imagery at 2.0-meter resolution. Eighty-six percent of the satellite platform and 98 percent of the payload technology were developed domestically.

The satellite is tasked with national land management and disaster monitoring — tracking environmental changes, supporting urban planning and cartography and providing rapid imagery response to natural disasters including typhoons, floods and wildfires.

The satellite was originally scheduled to launch in 2022 aboard a Russian Soyuz rocket. Russia's invasion of Ukraine in February of the year and the international sanctions that followed, however, forced Korea to renegotiate contracts and find an alternative launch vehicle. After several schedule shifts, the mission was reassigned to SpaceX's Falcon 9.

CAS500-2 will now spend approximately four months undergoing on-orbit testing and calibration before beginning its official mission.

Beyond its domestic mission, the government sees CAS500-2 as a launchpad for satellite exports.

Officials say Korea now has a cost-competitive, medium-class satellite platform ready for international markets, with Saudi Arabia, Peru and Indonesia cited as priority targets — often in conjunction with existing aerospace and defense export deals.

If the commercial pipeline materializes, it would mark an expansion of Korea's space industry from a government-funded research enterprise into a revenue-generating export sector.

BY SEO JI-EUN [[email protected]]