Propagation data are fundamental to building efficient, robust, and economical communication systems. Covering frequencies from .03 to 300 GHz, this handbook presents models that describe that data and make predictions for conditions that will affect operational systems. Topics include link margins for line-of-sight terrestrial systems, interference between systems, experiment design and calibration, prediction models for different environments and frequencies, Earth-space propagation effects, and attenuation prediction at different bands. Communications engineers around the world need this information readily at hand, and this is the first resource to offer it all within a single volume.