An airborne radar is flying at a constant altitude (h) and velocity (v). It uniformly searches the

Question:

An airborne radar is flying at a constant altitude $h$ and velocity $v$. It uniformly searches the ground as shown in the figure below. The antenna radiation pattern is given by
\[
F(\theta, \phi)=\left\{\begin{array}{cc}
\csc \theta & \theta_{1}0 & \text { elsewhere }
\end{array}ight\}
\]
Derive an expression for the directivity.

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