File:Bell telephone magazine (1922) (14570376427).jpg

Identifier: belltelephonemag26amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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f time and with-out detailed clerical operations ontheir part. The Development of Weather-chart Facsimile Transmission During World War II, the AirForces were faced with the tremen-dous problem of providing opera-tional units with accurate forecastsof weather conditions over base andtarget areas under conditions in whichtime was of utmost importance. Because of the complexity of airoperations, it was essential that com-manding officers have accurate fore-casts available well ahead of plannedoperations. Also, because of thelarge areas involved in both theEuropean and Asiatic theaters, it wasessential that forecasts at manypoints be coordinated. To complicatethe problem, comparatively few well-trained meteorologists were availa-ble. As additional personnel cannotbe trained over night in this field,the Air Weather Service establishedweather centrals to compile and ana-lyze weather data and to providebriefing officers at each command 1947 4^ PVeat her Charts by IV ire jor the .lir h\ orce
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post with accurate andup-to-the-minute infor-mation so that theycould intelligently plantheir operations. Various methodswere tried for trans-mitting the informa-tion, and the most suc-cessful proved to be asystem of briefingcharts which definedwind and cloud condi-tions that might beencountered over thebase and target areas.This information wasplotted on a map in aseries of heavy lines—which appeared tolend itself perfectly tofacsimile transmission.After considerable ex-perimentation, a fac-simile transmissionnetwork was established, and it con-tinued to serve successfully through-out the invasion of France. Hitherto, the transmission ofweather information to the fore-casters at all domestic Air Forcefields had been limited to the use ofprivate line teletypewriter networksof the Air Force and the Depart-ment of Commerce through a systemof coding the locations of isobars andother lines as passing so many mileseast or west of certain fixed referencepoints. This system, while trans-mi

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