With the increasing hostile man-made interference and electromagnetic environment worsening, anti-jamming gradually become one of the essential ability in satellite navigation receivers.

随着敌对人为干扰的日益增多和电磁环境的日益恶劣，抗干扰逐渐成为卫星导航接收机的必备能力之一。

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The ability to detect man-made interference is not much use unless the source can be located, however.

ECONOMIST: GPS jamming

Down in the rock pools, then, the news seems to be mixed: nature is showing a remarkable resilience in the face of man-made interference, but it is still far from clear what the wider impact will be from small changes to local ecology.

BBC: News | UK | West Wales recovering from 'environmental disaster'

Both offer remote, sparsely populated areas with low levels of man-made radio interference, along with world-class teams of astronomers.

ECONOMIST: A new radio telescope may catalyse African science