"MB" Enhancement

The "MB" curve is a poplular enhancement designed mainly for analysis of warm season convection.  Segments 1, 2, and 3
are extracted directly from the old "Z" curve: This steeper slope will give better definition to the low and middle clouds.  
Segments 4 through 7 contours convective areas.  Segment 8 slopes with a factor greater than zero from -63 C to -80 C,
 which allows for good definition of very cold cloud tops.  Although specific temperatures cannot be obtained...it better 
isolates the coldest tops by gradually going to white rather than producing a complete white-out at all temperatures 
colder than -65 C.  This curve is utilized for quantitative rainfall estimates.