Japan Readies Modified H-2A For Return to Flight

PAUL KALLENDER

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Japan Readies Modified H-2A For Return to Flight

机译：日本准备改装H-2A返回飞机

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Japan's workhorse H-2A rocket, having undergone a top-to-bottom review and significant modifications following a November 2003 failure, is set to return to flight Feb. 24 carrying a government weather and air traffic control satellite. A successful launch will validate the corrective actions and, perhaps more importantly, enable Japan to get on with the future of its space program, according to government and industry space officials here. Another failure, either in this launch or the five planned thereafter, could ignite a debate over the future of the program, one expert observer said. The last H-2A launch ended in failure after one of the vehicle's Solid Rocket Boost-er-A (SRB-A) strap-on motors suffered a burn-through in the throat of its nozzle. The burn-through damaged the H-2A's SRB-A separation system, and the vehicle, unable to jettison the weight of the spent booster, was ordered destroyed after range safety engineers determined it would not reach orbit. The failure destroyed a pair of high-priority imaging satellites — one optical and one radar — that were to be part of a four-satellite constellation intended to keep tabs on North Korean military activities.

机译：日本的重负荷战斗机H-2A火箭经过2003年11月的故障自上而下的审查和重大修改，定于2月24日重返飞机，搭载政府的天气和空中交通管制卫星。据政府和工业太空官员说，成功的发射将验证纠正措施，也许更重要的是使日本能够继续其太空计划的未来。一位专家观察员说，这次发射或随后计划的五次发射中的另一个失败，可能引发对该计划未来的辩论。上一次H-2A发射以失败告终，原因是该车辆的其中一辆Solid Rocket Boost-er-A（SRB-A）捆绑式电动机在其喷嘴的喉咙中烧穿。烧毁损坏了H-2A的SRB-A分离系统，在距离安全工程师确定它无法到达轨道后，无法抛弃用完的助推器的重量的车辆被勒令销毁。这次失败摧毁了一对高优先级成像卫星（一个光学雷达和一个雷达），这些卫星将成为旨在监视朝鲜军事活动的四颗卫星群的一部分。

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《Space news》 |2005年第7期|p.8|共1页
作者
PAUL KALLENDER;
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正文语种 eng
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Japan Readies Modified H-2A For Return to Flight

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