Show how sun determines volume on long waves that the suns activity Is probably the chief factor in determining the strength of long wave radio signals was the most Import important atit conclusion to in the annual report of the laboratory for special radio transmission research prepared by lr dr L W austin of the bureau of standards in addition to the curves and tables showing the routine of the he laboratory curves were shown in the report which indicate hindlea te a close relationship lation ship between the long wave signal strength and the changes in number of sun spots during the eleven year sunspot sun spot cycle the signals increasing creasing lill in strength with the increase of bun spots other curves given show periodic changes in the signals during the time of the t bo suns rotation twenty slit six days while others indicate a nine day period in the case of certain stations some of these curves also suggest fixed active areas on the sun which often produce increase in signal strength when they tace ace the earth these periodic relationships however are not considered as well established as the relationship of the monthly and yearly averages of sunspots sun spots and tiff rials nala extending over a number ot of year yeam |