You can connect to other websites from this website which are not under the jurisdiction of BookMeth. The nature, content and availability of such pages are not regulated by us. A recommendation or acceptance of the views articulated within them does not generally mean the incorporation of any ties. Connecting to our web implies acknowledging this policy agreement .
Reflexion Coefficient of the Ionosphere 639 on many occasions. My thanks are also due to Professor A. M. Tyndall for granting me facilities to work in this laboratory and to Dr. H. Jones for the interest he has taken in the present work.
640 F. W. G. White and L. W. Brown receiver may readily be found, but it is much more difficult to measure the intensity of the waves leaving the sender. In the experiments of Appleton and Ratcliffe, the calculated value of the latter factor was used.
642 F. W. G. White and L. W. Brown where K is a quantity, called the “ transmission coefficient ” defined by y _ a _2F"G (3) K (F)2 Under suitable conditions, when double reflexions are observed, the Breit and Tuve method permits F' and F" to be measured. If at the same time the amplitude of the ground wave (G) is found then the trans mission coefficient K may be calculated.
Reflexion Coefficient of the Ionosphere 643 The method by which the transmission coefficient K was measured is as follows. At suitable times when double reflexions were obtained the ratios F'/G and F"/F' were measured for either or both components and from these ratios the transmission coefficient was calculated as explained above. There were several difficulties which had to be overcome before the final value of the coefficient could be obtained. The criticism which follows applies not only to the determination of K but also to the measure ments of the reflexion coefficient, p, which are discussed below.
644 F. W. G. White and L. W. Brown portion, the value of dx corresponding to the flat portion was taken, since it is known that a large change in P' is accompanied by a much smaller change in th® actual path. It is considered that the error involved in this estimate is of the same order of magnitude as that in obtaining the average amplitude.
646 F. W. G. White and L. W. Brown One or two general remarks about these curves may be made here. No attempt has been made to draw a smooth curve through the values of log p, but in endeavouring to elucidate the absorption phenomena the general trend of the values of log p has been studied, for in this manner the mean value of a number of consecutive readings may be estimated.