🚀 go-pugleaf

A waterfall display of FFTs draws every new FFT curve on the screen
slightly below and "in front" of the last curve.  The effect is that
you get a 3-dimensional looking display with frequency as the x axis,
amplitude as the y axis, and time as the z axis.  The third axis
provides an very effective way to display time-varying signals.  For
example, Ray Vincent, formerly of SRI, who now works as an independent
consultant and professor at the Naval Post Graduate School uses a
system with a waterfall display to locate and identify all sorts of
radiated electrical noise.  Each different type of noise source has
it's own distinct three-dimensional pattern on a waterfall display.  

Greg