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Helnl Radio News Service
6/12/46
It has now been revealed that a group of experts working in the greatest secrecy under the general supervision of Dr. Dellinger and Dr. Smith made amazing progress during the war in predicting radio transmission conditions between any two places on the earth1 s surface. These predictions were made three months in advance.
This information was particularly needed by the military services because of the widespread use of radio in the far corners of the world, the necessity for efficient utilization of frequen¬ cies in the crowded radio spectrum, and the importance of knowing just where radio waves were going and how to insure their arriving at their destination. To this end the laboratory prepared monthly world-wide charts of predicted ionospheric data, from which usable frequencies for any path could be calculated; distributed all available ionospheric and radio propagation data to the armed ser¬ vices, commercial users, and scientific laboratories; sent out warnings of expected radio disturbances associated with "storms" in the ionosphere; carried on research in radio wave propagation and in the technics of prediction; developed methods for solving high-frequency radio propagation problems; studied radio wave ab¬ sorption in the ionosphere; analyzed radio traffic data from the propagation viewpoint, and correlated high-frequency direction¬ finder errors with ionosphere conditions.
Dr. Dellinger joined the National Standards Bureau1 s staff in 1907 and has headed the radio work since 1919. He receiv¬ ed his Ph, D. from Princeton University in 1913 and the Sc.D. from George Washington University in 1932* He is a past-president of the Institute of Radio Engineers, and a recipient of its Medal of Honor. He has represented the United States at numerous inter¬ national conferences on radio and telecommunications affairs.
Dr. Smith received his Ph. D. from the University of Pennsylvania and has gained a world reputation for his work on determination of radio propagation conditions from ionosphere data.
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HISTORY REPEATS ITSELF IN FACSIMILE BROADCAST
The first facsimile message to be received over VHF trans¬ mission on a speeding railroad train has been accomplished using the standard Bendix railroad radio equipment now in use on the Baltimore & Ohio Railroad. The event which marked anew forward step in communications was staged last week with a simple ceremony in the same room of the Capitol Building from which the first tele¬ gram was sent to Baltimore 102 years ago by S. F. B. Morse, inventor of the telegraph.
Miss Margaret Truman, daughter of the President of the United States, reiterated the original Morse message as she care¬ fully penned in her own handwriting, "What Hath God Wroght". It was reproduced on a speeding B. & 0. passenger train upon leaving Baltimore for a. scheduled run to the nation1 s capitol.
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