A 48" base is very small for the windload load area and the actual size of the 10' dish. We suggest that the NPM base be at least 2/3rds the diameter of the dish.
Where will the NPM be placed? If it will be placed on a cement or solid surface, you can increase the weighting on the smaller pad, but if mounting on a roof, you will want a larger footprint for the pad to distribute the weight and wind load.
You will also probaly want a taller post as it would almost be contacting the surface when panned to east or west.