Radio range variation

Author(s): R.H. Marriott
Publisher: IEEE - Institute of Electrical and Electronics Engineers, Inc.
Publication Date: 1 March 1914
Volume: 2
Page(s): 37 - 53
ISSN (Paper): 0731-5996
DOI: 10.1109/JRPROC.1914.216610



Thrughout this paper, whenever radio range variation is mentioned I shall refer to a variation in the distance over which messages could be transmitted and read on reception. This is a subject to which the author has given considerable attention, having taken observations on it and on the strength of atmospheric disturbances intermittently over a period of about fourteen years. The first records which we shall consider were made at the Manhattan Beach station of the United Wireless Telegraph Company. This station was located at Coney Island in New York City, and its call letter was "DF" (American Morse code). It is quite clear that in order to study radio range variation and atmospherics, as thoro a record as possible of weather conditions around and between the stations should be obtained. The amateur is probably a particularly appropriate individual for the study of ranges and atmospherics, because his financial situation is not dependent upon the nature of his reports. It may well be that the studying of radio ranges and atmospherics will be of considerable use to weather bureaus. Possibly we shall obtain considerable information regarding the upper atmosphere thru such study, and this, too, of a nature which cannot be obtained by present methods. In addition, such study may get us much data concerning the lower atmosphere, and thus assist and supplement our present methods. For the purposes of such measurement, the time signals which are sent out by such stations as Arlington may be received in various parts of the country and be carefully measured for intensity.