  In this paper, we present a tutorial overview of state-of-the-art radio
frequency (RF) clutter modeling and simulation (M&S) techniques. Traditional
statistical approximation based methods will be reviewed followed by more
accurate physics-based stochastic transfer function clutter models that
facilitate site-specific simulations anywhere on earth. The various factors
that go into the computation of these transfer functions will be presented,
followed by several examples across multiple RF applications. Finally, we
introduce a radar challenge dataset generated using these tools that can enable
testing and benchmarking of all cognitive radar algorithms and techniques.
