Attenuation, cont.

An expression for the attenuation is:


where k is a measure of the amount of attenuation (attenuation factor)

[k] = 1/L

Taking Dr = dr and Pr-P0 = dP0

Then (1) becomes:


Integrating the left-hand side gives:


where the exponential term is the attenuation factor which we will define as:


Substituting (3) into the radar equation gives: