The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A high-frequency sky-wave propagation experiment, carried out on November 19, 1944 by the Institute of Physics, Luftkriegsakademie, Gatow, in co-operation with the Deutsche Reichspost, is described. Signals of duration of 10 to 12 msec were transmitted at 0.5-sec intervals from DLO, Rehmate (near Berlin) on 19,947 kc so that echoes which travelled repeatedly around the earth might be studied. The...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.