Microwave Propagation in the Upper Troposphere

Ernest P. Manly, W7LHL PO Box 1307 Graham, WA 98338-1307 [email protected] The selection of propagation modes for amateur microwave stations is often progressive. Most of us start with simple equipment and the contacts are usually by line-of-sight propagation. Longer distances are then accomplished by going to high locations. As equipment gets better, the use of various objects for reflections and scattering becomes a possibility. Hills, mountains, water tanks are attractive, since they are generally available at any time. Aircraft are also attractive reflectors when they are at high altitudes.1 Scat-