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Is South Korea ‘mistaken’ about nature of North’s hypersonic missile test?

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Is South Korea ‘mistaken’ about nature of North’s hypersonic missile test?

The announcement contradicts South Korea’s assessment that the suspected hypersonic missile, launched from Pyongyang, blew up mid-flight after travelling some 250km.

“North Korea’s missile launched yesterday exploded in an early stage of the flight,” Colonel Lee Sung-jun, spokesman for Seoul’s Joint Chiefs of Staff, said on Thursday.

“North Korea failed in its last space rocket launch [in May] and failed again yesterday, and we believe that there is a motive to cover these up,” he said, adding both South Korea and the United States stood by their assessment that the launch was a failure.
A photo released by North Korean state media shows what it says was a successful separation and guidance control test of individual mobile warheads. Photo: KCNA via KNS / AFP
Seoul’s assessment also differed slightly from the analysis by Japan’s Defence Ministry, which said the ballistic missile was estimated to have flown more than 200km at a maximum altitude of about 100km before crashing into the sea.

The North said the test used “the first-stage engine of an intermediate-range solid-fuel ballistic missile within a 170km-200km radius”, which is favourable for measuring the flight characteristics of the MIRV.

The MIRV was accurately guided to three target coordinates, it claimed.

Its Missile General Bureau “successfully conducted” a test of manoeuvrable warheads’ separation and guidance, which was “of great significance in achieving the goal of upgrading missile technology”, mouthpiece newspaper Rodong Sinmun said.

The goal of the test was “to ensure the capability of destroying different targets with multiple warheads”, it said.

However, experts argue that further validation is needed, noting that the North has a track record of exaggerating military technology advances and manipulating pictures of missile launches.

“Barring such an alteration of photos, these pictures published by North Korean media appear to back up their allegations that the test was for verifying technology needed for a missile carrying multiple warheads and decoys”, Lee Il-woo, a senior researcher at the Korea Defence Network think tank, told This Week in Asia.

“The South might have mistaken the separation of multiple warheads and decoys from the payload module as a mid-flight explosion of a hypersonic ballistic missile.”

North Koreans are seen near the border with South Korea from an observation point in Paju on Thursday. Photo: AP

Such a low-flying missile carrying multiple warheads and decoys could pose serious threats to US aircraft carriers operating near the Korean peninsula, he said.

He noted that the test had occurred as a US aircraft carrier arrived in South Korea ahead of a three-way military drill with Japan.

The development of MIRV technology, crucial for evading missile interception, was one of the stated goals in North Korea’s five-year military build-up plan announced in 2021.

Chang Young-keun, a missile scientist at the Research Institute for National Security Strategy, said the missile test was not undertaken at high enough altitudes to ensure guidance and re-entry capabilities for intercontinental ballistic missiles.

“The primary objective appears to be to verifying guidance control systems” of a post boost vehicle, he told This Week in Asia. Such vehicles deploy multiple warheads and decoys after the main booster phases.

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