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05-16-2017, 03:51 AM
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SEOUL: **rth Korea’s successful missile test-launch signals major advances in developing an intercontinental ballistic missile, such as mastery of re-entry tech**logy and better engine performance key to targeting the United States, experts say.
The isolated country has been developing a long-range missile capable of striking the mainland United States mounted with a nuclear warhead.
That would require a flight of 8,000 km or more and tech**logy to ensure a warhead’s stable re-entry into the atmosphere.
The **rth’s official KCNA news agency said the new strategic ballistic missile named Hwasong-12, fired on Sunday at the highest angle to avoid affecting neighbouring countries’ security, flew 787 km on a trajectory reaching an altitude of 2,111.5 km.
The details reported by KCNA were largely consistent with South Korean and Japanese assessments that it flew further and higher than an intermediate-range missile (IRBM) tested in February from the same region, **rthwest of Pyongyang.
Such an altitude meant it was launched at a high trajectory, which would limit the lateral distance travelled.
But if it was fired at a standard trajectory, it would have a range of at least 4,000 km, experts said.
The test "represents a level of performance never before seen from a **rth Korean missile", John Schilling, an aerospace expert, said in an analysis on the US-based 38 **rth website.
"It appears to have **t only demonstrated an intermediate-range ballistic missile (IRBM) that might enable them to reliably strike the US base at Guam, but more importantly, may represent a substantial advance to developing an intercontinental ballistic missile (ICBM)."
KCNA said the test launch verified the homing feature of the warhead that allowed it to survive "under the worst re-entry situation" and accurately detonate.
The claim, if true, could mark an advancement in the **rth’s ICBM programme exceeding most expectations, said Kim Dong-yub, a professor at Kyungnam University’s Institute of Far Eastern Studies in Seoul.
Kim, a former South Korean navy ******r, added the trajectory showed the **rth was clearly testing the re-entry tech**logy under flight environments consistent for a ICBM.
The **rth has successfully launched long-range rockets twice to put objects into space.
But many had believed it was some years away from mastering re-entry expertise for perfecting an ICBM, which uses similar engineering in early flight stages.
Sunday’s missile launch also tested the **rth’s capability to carry a "large-size heavy nuclear warhead", the state news agency said.
"The test-fire proved to the full all the technical specifications of the rocket ...like guidance and stabilisation systems ...
and reconfirmed the reliability of new rocket engine under the practical flight circumstances," KCNA said.
On Monday, South Korea’s military played down the **rth’s claim of technical progress on atmospheric re-entry, saying the possibility was low.
**rth Korea’s official Rodong Sinmun newspaper devoted half of its six-page Monday edition to coverage of the missile test, with vivid colour photographs of the launch and jubilant leader Kim celebrating with military ******rs.
The pictures featured a long **se-coned projectile that appeared to be similar to missiles displayed during an April 15 military parade for the birth anniversary of state founder Kim Il Sung, the current leader’s grandfather.
The **se cone resembles that of the KN-08 ICBM the **rth is believed to be developing, and the lofted trajectory tests re-entry by putting the missile through extra stress, said Joshua Pollack of the US-based **nproliferation Review.
"This is an advanced missile, if their claims are true," he said.
KCNA said Kim accused the United States of "browbeating" countries that "have ** nukes", warning Washington **t to misjudge the reality that its mainland was in the **rth’s "sighting range for strike".
**rth Korea, which is banned by UN resolutions from engaging in nuclear and missile developments, has accused the United States of a hostile policy to crush its regime, calling its nuclear ******* a "sacred sword" to protect itself.
The **rth’s leader, Kim, has said it was in final stages of developing an ICBM.
It was difficult to say when the **rth will have a reliably tested ICBM ready to deploy, said Lee Choon-geun, a senior research fellow at South Korea’s state-run Science and Tech**logy Policy Institute.
"When it comes to actual deployment, developed countries have tested at least 20 ICBMs and their success rate should be around 90 percent.
It is **t there yet," he said.
But the new engine used for Sunday’s test signalled a major step forward in the intermediate-range missile development, one that can be modified for an ICBM flight, Lee added.
The lofted trajectory that would have result in more than 40 times the gravitational force at re-entry also raises questions about the stability of the payload and how much stress it can withstand, said Munich-based aerospace engineer Markus Schiller.
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SEOUL: **rth Korea’s successful missile test-launch signals major advances in developing an intercontinental ballistic missile, such as mastery of re-entry tech**logy and better engine performance key to targeting the United States, experts say.
The isolated country has been developing a long-range missile capable of striking the mainland United States mounted with a nuclear warhead.
That would require a flight of 8,000 km or more and tech**logy to ensure a warhead’s stable re-entry into the atmosphere.
The **rth’s official KCNA news agency said the new strategic ballistic missile named Hwasong-12, fired on Sunday at the highest angle to avoid affecting neighbouring countries’ security, flew 787 km on a trajectory reaching an altitude of 2,111.5 km.
The details reported by KCNA were largely consistent with South Korean and Japanese assessments that it flew further and higher than an intermediate-range missile (IRBM) tested in February from the same region, **rthwest of Pyongyang.
Such an altitude meant it was launched at a high trajectory, which would limit the lateral distance travelled.
But if it was fired at a standard trajectory, it would have a range of at least 4,000 km, experts said.
The test "represents a level of performance never before seen from a **rth Korean missile", John Schilling, an aerospace expert, said in an analysis on the US-based 38 **rth website.
"It appears to have **t only demonstrated an intermediate-range ballistic missile (IRBM) that might enable them to reliably strike the US base at Guam, but more importantly, may represent a substantial advance to developing an intercontinental ballistic missile (ICBM)."
KCNA said the test launch verified the homing feature of the warhead that allowed it to survive "under the worst re-entry situation" and accurately detonate.
The claim, if true, could mark an advancement in the **rth’s ICBM programme exceeding most expectations, said Kim Dong-yub, a professor at Kyungnam University’s Institute of Far Eastern Studies in Seoul.
Kim, a former South Korean navy ******r, added the trajectory showed the **rth was clearly testing the re-entry tech**logy under flight environments consistent for a ICBM.
The **rth has successfully launched long-range rockets twice to put objects into space.
But many had believed it was some years away from mastering re-entry expertise for perfecting an ICBM, which uses similar engineering in early flight stages.
Sunday’s missile launch also tested the **rth’s capability to carry a "large-size heavy nuclear warhead", the state news agency said.
"The test-fire proved to the full all the technical specifications of the rocket ...like guidance and stabilisation systems ...
and reconfirmed the reliability of new rocket engine under the practical flight circumstances," KCNA said.
On Monday, South Korea’s military played down the **rth’s claim of technical progress on atmospheric re-entry, saying the possibility was low.
**rth Korea’s official Rodong Sinmun newspaper devoted half of its six-page Monday edition to coverage of the missile test, with vivid colour photographs of the launch and jubilant leader Kim celebrating with military ******rs.
The pictures featured a long **se-coned projectile that appeared to be similar to missiles displayed during an April 15 military parade for the birth anniversary of state founder Kim Il Sung, the current leader’s grandfather.
The **se cone resembles that of the KN-08 ICBM the **rth is believed to be developing, and the lofted trajectory tests re-entry by putting the missile through extra stress, said Joshua Pollack of the US-based **nproliferation Review.
"This is an advanced missile, if their claims are true," he said.
KCNA said Kim accused the United States of "browbeating" countries that "have ** nukes", warning Washington **t to misjudge the reality that its mainland was in the **rth’s "sighting range for strike".
**rth Korea, which is banned by UN resolutions from engaging in nuclear and missile developments, has accused the United States of a hostile policy to crush its regime, calling its nuclear ******* a "sacred sword" to protect itself.
The **rth’s leader, Kim, has said it was in final stages of developing an ICBM.
It was difficult to say when the **rth will have a reliably tested ICBM ready to deploy, said Lee Choon-geun, a senior research fellow at South Korea’s state-run Science and Tech**logy Policy Institute.
"When it comes to actual deployment, developed countries have tested at least 20 ICBMs and their success rate should be around 90 percent.
It is **t there yet," he said.
But the new engine used for Sunday’s test signalled a major step forward in the intermediate-range missile development, one that can be modified for an ICBM flight, Lee added.
The lofted trajectory that would have result in more than 40 times the gravitational force at re-entry also raises questions about the stability of the payload and how much stress it can withstand, said Munich-based aerospace engineer Markus Schiller.
http://feeds.feedburner.com/~r/World-TheNewsInternational/~4/HCGKTsLRhzo
أكثر... (http://feedproxy.google.com/~r/World-TheNewsInternational/~3/HCGKTsLRhzo/204684-N-Koreas-latest-missile-launch-suggests-progress-towards-ICBM)