There’s just one hitch: the system still needs guinea pigs. Even the best weather models can’t pinpoint where clear-air turbulence will occur. So the NCAR programs continue to rely on firsthand reports from planes that have already been tossed around. New technologies could change that in coming years. A plane equipped with a lidar sensor—which uses lasers to detect much finer particles than radar can—could pick up on turbulence even in a cloudless sky. But lidar systems are still too bulky and expensive to fit into a plane’s nose cone. And the government and the airline industry have been slow to invest in improving them. For now, the best hope for a flight heading into turbulence might be to program the plane itself to ride the bumps.
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前些年，邱大爷探亲不容易。他家住四川邻水县高滩镇，属于现在的川渝高竹新区。坐乡村巴士到客运站，赶客车进重庆主城区，换乘市内公交……掰着手指数步骤，邱大爷无奈摇头。