Tropospheric scatter communications Past, present, and future

In the 11 years since the first practicable operational tropo systems were developed, there has been a tremendous growth in their number and complexity. This article describes the principles and applications of tropospheric scatter communications and discusses current development trends. Included is a table listing practically all of the tropo systems installed around the world, with pertinent technical data, together with maps showing the geographic location of most systems. The maps are keyed to the table for easy reference.