The practical reason for understanding the electrical nature of ash plumes is that they can interfere with aircraftradio communication.
进行此类研究的实际原因在于火山灰带电性将对飞机无线电通讯造成干扰。
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What about the next generation of air-traffic control systems that promise to use GPS satellites and radio transponders to warn all aircraft in a given area about the presence of others?
Over the years, everything from gas canons, pyrotechnics, lasers, ultrasound, stuffed owls and radio-controlled model aircraft have been tried to scare birds away from runways.