SERVICE PROJECTS 



The Committee on Propagation did all of its work under Project Control SOS-9, which was 

 originall}^ set up througli the request of the Combined Chiefs of Staff foUowuig recommendations 

 submitted by the Combined Meteorological Committee [CMC] (1): that the Committee on 

 Propagation of the National Defense Research Committee be requested to act as a coordinating 

 agency for all meteorological information associated with short-wave propagation, (2) that 

 the Committee on Propagation be requested to forward periodically to the CMC a list of all 

 reports and papers dealing with the meteorological aspects on short wave propagation which have 

 been received or transmitted by that Committee. 



Later the Combined Meteorological Committee in its thirty-seventh meeting on Tuesday, 

 February 22, 1944, agreed that the NDRC Committee on Propagation be recognized as the 

 supervising committee on all basic research being done in the United States on the related prob- 

 lems of radar propagation and weather, in addition it shall be the recognized channel whereby 

 international exchange of papers of the two related sciences will be effected. 



The Joint Communications Board [JCB] therefore approved the following poUcy, 

 which was concurred in by NDRC and by the Joint Meteorological Committee: 



1. The NDRC Propagation Committee and its associated working groups will initiate 

 and exercise teclmical supervision over such tests and investigations as they deem necessary 

 to ascertain the nature of the above mentioned propagation anomalies in the VHF, UHF, 

 and SHF bands, to devise the most practicable methods to determine the occurrence and 

 characteristics of these anomalies from appropriate meteorological forecasts, with a view to 

 improving the interim solutions offered by the Joint Wave Propagation Committee of the 

 JCB. 



2. The Army and Navy will furnisli by direct coordination between them the basic staff 

 guidance for such tests and mvestigations. They will accomplish this by determining (a) the 

 specific forms in which basic prediction data shall be presented, and (h) the method of use 

 required for operational forecast of propagation anomalies in the VHF, UHF, and SHF 

 bands. 



3. When the NDRC requires the cooperation of the operating units of the Aj'my and 

 Navy in conducting such tests and investigations as it deems necessary and this cooperation 

 is of such an extent and nature that it cannot be furnished by informal coordination, it will 

 be requested through the Joint Wave Propagation Committee of the JCB. Such requests will 

 be initiated by the NDRC representative on the Wave Propagation Committee and recom- 

 mended to the JCB by the Joint Wave Propagation Committee for consideration. 



4. The Joint Wave Propagation Committee will be responsible for devising and furnish- 

 ing immediately interim operational forecasting guides based upon information already 

 available. 



On April 3, the Coordinator of Research and Development requested that the Army 

 Project SOS-9 be made a joint Army-Navy project. Project No. AN-16 was assigned to this. 



On May 23, 1944, the Chief Signal Officer requested that under Project AN-16 the 

 following work be inaugurated : 



Project AC 230.04, "Wave Propagation Study of Line-of-Sight Communication and 

 Navigation." 



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