上海股市重跌 人民币缩水 + 太空定位核潜艇？

choi

(1) 小山, 上海股市重跌 人民币缩水显资金出走加剧. 法广, Oct 17, 2016
http://cn.rfi.fr/%E4%B8%AD%E5%9B ... 0%E5%8A%A0%E5%89%A7
("据路透社今天报导，中国股市上海B股 [B shares] 指数周一午后暴跌，创九个多月最大单日跌幅。与此同时，人民币兑美元也再创逾六年新低")

Note: There is no need to read the Reuters report, which is short, reporting what happened (especially stock market crash) but without analysis (why).

(2) 文木, 宇航员：勤拍照、做实验、定位核潜艇？ 德国之声, Oct 17, 2016
http://www.dw.com/zh/%E5%AE%87%E ... E8%89%87/a-36061638
("对此，德国航空航天中心（DLR）德中太空合作项目负责人布朗博士（Dr Markus Braun）表示："这方面是我们并不了解，也不想去作评价。我只能说，（核潜艇）可以用卫星定位，这不需要空间站")

, which is based on

Stephen Chen, The hunt for submarines... from space. South China Morning Post, Oct 17, 2016.
http://www.scmp.com/news/china/d ... owards-pla-tracking

Quote:

(a) "Shenzhou XI spaceship that blasted off from the Jiuquan Satellite Launch Centre in Inner Mongolia on Monday [Oct 17] morning will soon dock with the Tiangong-2 space laboratory, launched last month, which is carrying the world's first space-based cold atom clock.

"The ultra-accurate timepiece shares its core technology with cold atom interferometers, which can measure tiny changes in gravitational pull with unprecedented sensitivity, and one of the devices, to be built and put on the Chinese space station, could potentially be used to track nuclear submarines.

"Nuclear submarines can be massive, with the largest measuring more than 170 metres in length and displacing 48,000 cubic metres of water, and when they cruise several hundred metres below the ocean’s surface they generate many gravitational ripples. An extremely sensitive detector could catch and analyse the invisible ripples to locate and follow the submarine.

"Using cold atom interferometry to detect submarines is a controversial technology * * * China could be the first nation to do so, according to a researcher at the Beijing-based China Academy of Space Technology [(CAST); 中国空间技术研究院; based in Beijing]

(b) "Professor Tu Liangcheng 涂良成, who has studied the precise measurement of gravity at Wuhan's Huazhong University of Science and Technology 华中科技大学 * * * Tu said the Chinese navy desperately wanted to be able to track foreign nuclear submarines, but it was 30 years behind the capabilities of the United States when it came to submarine-detection technology. * * * There are many ways to measure gravitational variations.