Building a Radar Datacube

This program creates a radar datacube using functions from the Phased
Array System Toolbox. This program shows 2 examples:
1- A radar datacube with a single target, an 8 element uniform linear
array, 1000 samples per radar pulse, and 32 pulses
2- A radar datacube with 20 targets, a 121 element array mounted on the
surface of a sphere, 20k samples per pulse and 32 pulses
In both cases the program is divided up into 2 sections. Section 1
defines and initializes the objects needed to build the radar data cube,
and Section 2 runs the simulation loop to generate the pulses, move the
target(s), reflect the pulses off the target and back to the radar,
collect the received signals and build the datacube.