Word: airings
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Dates: during 1930-1939
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Makes Ocean Air Maps...
...tuning in station WIXFW at 7:30 o'clock in the morning, a radio fan may catch the signals sent down to earth by the radiosonde. Because upper air conditions are vital to air pilots, the Observatory has been getting help from the International Ice Patrol, the United States Weather Bureau, M. I. T., the Navy, and the Canadian, British, French, and Danish governments...
...total weight of the radiosonde is only 18 ounces. Air pressure is obtained by a pair of small aneroid bellows; the temperature, by a bimetallic strip which coils with change in temperature; and the humidity, by a single human hair. Each of the three instruments is fitted with a needle which touches a wire, sending out a radio signal by means of a micro-transmitting set. The significance of the signals depends on the time between them. The measurement of this time interval by the operators on the ground provides all the needed information...
Although each ascent of a radiosonde costs as much as $30, they have proved invaluable for the air service, which can not get accurate and steady weather reports from the stratosphere in any other...
Like any other businesslike airline, K. L. M. (Royal Dutch Air Lines) likes to run from city to city by the most direct route. But last week its new special London-Warsaw plane service was routed via Copenhagen, Gdynia and south to the Polish capital, avoided the direct route across Germany...