The radar is located at the
point *P*_{m}.

* α*_{r} is the radar pointing
angle.

*ζ* is the radar squint
angle.

*β* is the horizontal radar
half beamwidth

*γ *is the vertical
radar half beamwidth.

The ellipse depicts one of the possible
3-dB

illuminated shapes and areas on the ground.

For each radar position, the new
footprint

shape and area is calculated .