1. North Korea says new missile can re-enter atmosphere

North Korea says new missile can re-enter atmosphere

North Korea has said the missile it tested on Wednesday held a warhead capable of re-entering the Earth's atmosphere.

By: | Published: November 30, 2017 6:38 AM

North Korea has said the missile it tested on Wednesday held a warhead capable of re-entering the Earth’s atmosphere. (Source: IANS)

North Korea has said the missile it tested on Wednesday held a warhead capable of re-entering the Earth’s atmosphere. The claim was not proven and experts have cast doubt on the country’s ability to master such technology, BBC reported on Wednesday. North Korean Kim Jong-un called the launch “impeccable” and a “breakthrough”. It was the first test from Pyongyang in more than two months, after a flurry earlier this year. It has been condemned by the international community. US President Donald Trump spoke to China’s President Xi Jinping by telephone, the White House said, urging him to “use all available levers to convince North Korea to end its provocations and return to the path of denuclearisation”. Xi responded by telling Trump it was Beijing’s “unswerving goal to maintain peace and stability in north-east Asia and denuclearise the Korean peninsula”. China is North Korea’s biggest ally and most important trading partner, and the two share a land border. Experts say the height reached by the inter-continental ballistic missile (ICBM) indicates Washington could be within range, although North Korea is yet to prove it has reached its aim of miniaturising a nuclear warhead.

White House spokeswoman Sarah Sanders said the US would put more sanctions on North Korea “very shortly”. The Hwasong-15 missile, described as North Korea’s “most powerful”, was launched in darkness early on Wednesday. It landed in Japanese waters but flew higher than any other missile the North had previously tested. The test, which defied international sanctions imposed over the North’s weapons programme, drew swift international condemnation. South Korea responded by launching one of its own ballistic missiles in a live-fire drill. Pyongyang says the missile reached an altitude of 4,475 km and flew 950 km in 53 minutes. That huge altitude, sending it far outside Earth’s atmosphere, is close to independent estimates made by South Korea’s military.

The projectile, fired at a steep incline, did not fly over Japan as some have done in the past, and landed about 250 km short of its northern coast, according to Japanese officials.

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  1. Andrew Klepatsky
    Nov 30, 2017 at 5:36 pm
    Today, when Kim published photos of his new missile Hwasong-15 it became possible to estimate the payload mass it carried in the test 11/29/2017. Diameter (D15) of the new missile could be evaluated from the picture of the missile half-mounted on the carrier-truck. Assuming the height of a man standing on the truck platform 1.7m one obtains D15 2.0m. With the diameter found, one can evaluate the total length of the missile without payload L15 15 (note the length of two stages of Hwasong-14 is very close to that L14 14.85m). We assumed that Hwasong-15 is a two-stage rocket and that lengths of its stages are the same as those of Hwasong-14 (L1 12.4m and L2 2.45m). This gives us the propellant mass. Without video, we could not measure acceleration and evaluate the burnout time. So we assumed burnout times for either stage of Hwasong-15 equal to those of Hwasong-14 (t1 150s and t2 48s). With all these assumptions, the computer simulation of Hwasong-15 test flight Nov/29/2017 gives the mass
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