This chapter discusses the effects of the transmission medium on the propagation of electromagnetic waves traveling from a radar transmitter to a target and back to the receiver. Many factors can influence the propagating radar signal, such as the composition of the atmosphere, clouds, rain, insects, and obstacles. The wave will also be affected by the ground the wave passes over as well as other topological features, such as hills, valleys, and lakes. This chapter considers only how these topological features affect the propagating wave, while the radar return from these features, known as clutter, are discussed in the next chapter.
Propagation Effects and Mechanisms, Page 1 of 2
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