Radio sunset fading tests

In special tests from March 24 to April 2, the Bureau of Standards, with the cooperation of about 20 laboratories in various cities, made records of the variation in intensity of signal received from station WGY, General Electric Co., Schenectady, N. Y., during the sunset period. In order to study further the effects of sunset a second series of observations was started May 19 on station KDKA, Westinghouse Electric & Manufacturing Co., East Pittsburgh, Pa. Records were made by an augmented group of laboratories on six days, distributed during the period May 19 to May 29. The observing periods were approximately three hours long, centering at the time of sunset at the receiving station. The records of these observations as well as those of the tests on WGY are being studied and a report on the characteristic effects which these observations established will be issued at a later date.