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[其他发射] 2017年8月31日21:30,IRNSS-1H由PSLV-XL从萨迪什亚万航天中心发射失败,整流罩未分离

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wsl20005 发表于 2017-2-13 08:39 来自航空航天港手机版! | 显示全部楼层 |阅读模式
任务简报
发射时间: 2017-08-31/21:30 (UTC+8)
运载工具: PSLV-XL
有效载荷(国籍): IRNSS-1H (印)
发射场(国籍): 萨迪什亚万(印度)
工位: SLP
状态: 发射失败
轨道类型及参数: GTO
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接替星钟失效首星IRNSS-R1A.
http://gpsworld.com/3-atomic-clocks-fail-on-1-indian-satellite-replacement-prepped/

Three atomic clocks onboard a single satellite of the NAVIC Indian regional navigation satellite system have failed.

Indian Space Research Organization (ISRO) Chairman A.S. Kiran Kumar told The Hindu newspaper that the agency is trying to restart the clocks. Kumar said the affected satellite, IRNSS-1A, is otherwise healthy, and the rest of the constellation is performing its core function of providing accurate position, navigation and time.

Last week, the European Space Agency discussed clock failures on board Galileo satellites. Rubidium atomic clocks onboard both constellations were manufactured by Spectratime of Switzerland, but the cause of the failures has not been identified and could involve factors other than clock design.

IRNSS-1A is equipped with one primary and two back-up clocks. At this time, it “will give a coarse value. It will not be used for computation. Messages from it will still be used,” Kumar said. “There are some anomalies in the atomic clock system on board. We are trying to restart it. Right now we are working out a mechanism for operating it.”

The ISRO is readying one of the two back-up navigation satellites — IRNSS-1H — to replace it in space in the second half of this year. IRNSS-1A was launched in July 2013 and has an expected lifespan of 10 years.

The Indian Regional Navigation Satellite System (IRNSS) constellation was completed April 28, 2016. It was then renamed NAVIC — Navigation Indian Constellation, by India’s Prime Minister Narendra Modi.

With seven satellites in orbit, the constellation’s primary focus is to provide information in the Indian region and 1,500 kilometers around the mainland.
cmj9808 发表于 2017-6-19 15:02 | 显示全部楼层
cmj9808 发表于 2017-8-3 12:17 | 显示全部楼层
NSF消息,8月28日发射,代替原子钟失灵的IRNSS-1A
http://forum.nasaspaceflight.com ... g1709184#msg1709184
cmj9808 发表于 2017-8-15 12:25 | 显示全部楼层
卫星已于上周六起运,IRNSS-1H是ISRO将卫星交由印度航天工业界制造的首个尝试,1/4的工作量由六家国营或私营企业完成,而下一颗IRNSS-1I的绝大部分总装工作将在ISRO的监督下交由工业界完成。

http://www.thehindu.com/todays-p ... article19488075.ece
cmj9808 发表于 2017-8-22 20:50 | 显示全部楼层
NOTAM发布,8月31日~20:00发射。

https://www.google.com/maps/d/vi ... 05723333331&z=4
dadao 发表于 2017-8-23 04:27 | 显示全部楼层
cmj9808 发表于 2017-8-22 20:50
NOTAM发布,8月31日~20:00发射。

https://www.google.com/maps/d/viewer?mid=1NwRFBYcVO55f2q-OzgDzzSSA ...

8月份最后的一次发射。
dadao 发表于 2017-8-28 08:26 | 显示全部楼层

                               
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 楼主| wsl20005 发表于 2017-8-29 09:49 | 显示全部楼层
show_file.png
cmj9808 发表于 2017-8-29 12:11 | 显示全部楼层
IRNSS-1H使用的铷钟进行了改进。
An improved version of the clock has been developed eliminating the hitch, which will be launched with the IRNSS-1H.

http://www.deccanchronicle.com/s ... ks-in-irnss-1h.html
月神号特快 发表于 2017-8-31 21:45 | 显示全部楼层
好像整流罩没分离,情况不妙啊....
月神号特快 发表于 2017-8-31 21:51 | 显示全部楼层
4子级已关机,轨道只到了167 x 6555 km,卫星不知到哪了.....
 楼主| wsl20005 发表于 2017-8-31 22:00 | 显示全部楼层
花无百日好!无言的结局-失败!
show_file-1.jpeg
航天迷 发表于 2017-8-31 22:02 来自航空航天港手机版! | 显示全部楼层
印度也来了,多灾多难。
cmj9808 发表于 2017-8-31 22:07 | 显示全部楼层
整流罩未分离,低级错误啊
爆破鬼才太空X 发表于 2017-8-31 22:20 | 显示全部楼层
这会给全球航天业界都带来影响
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xyqq 发表于 2017-8-31 22:28 | 显示全部楼层
爆破鬼才太空X 发表于 2017-8-31 22:20
这会给全球航天业界都带来影响

抬举阿三了。
航天迷 发表于 2017-8-31 22:36 来自航空航天港手机版! | 显示全部楼层
PSLV多年的不败金身被打破。
hand 发表于 2017-8-31 22:43 | 显示全部楼层
cmj9808 发表于 2017-8-31 22:07
整流罩未分离,低级错误啊

这不科学呀,火工品失效?难不成三哥发明了什么新的整流罩分离方式?
航天迷 发表于 2017-8-31 22:51 来自航空航天港手机版! | 显示全部楼层
PSLV20年、36次连续成功被打破。
阿亚图拉 发表于 2017-8-31 22:54 | 显示全部楼层
这次发射太诡异了,ISRO的视频直播首次高清了,而且以前一直是一个理工男在播报倒计时和飞行状态,这次换成了一个女人,结果就砸锅了。 这怎么解释呢?
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