China tested a handheld submarine detector. It tracked a subway train underground

According to a report by SCMP… Chinese researchers have showed a handheld quantum magnetometer built for hunting submarines in a striking real-world test: it tracked a subway train rumbling beneath a city street.
The device, developed by Peng Xinhua and colleagues at the University of Science and Technology of China, is described in a study published on September 14 in Acta Physica Sinica.
Though it is scarcely larger than a pencil and draws only 5 watts of power, it can isolate the magnetic disturbance caused by a moving… complete report is on below link. Source: https://www.scmp.com/news/china/science/article/3367965/china-tested-handheld-submarine-detector-it-tracked-subway-train-underground?utm_source=rss_feed