I actually know a fair bit about this. This is the first S-Band phased-array mobile radar. The beamwidth is quite wide because an S-band requires a huge antenna, but since it is mobile it can get closer to storms making the wide beam less relevant. The phased-array aspect is amazing. Every one of the individual elements that makes up the radar panel is technically a separate radar. The panel spins mechanically but the tilting is done electronically. So you can get a whole volume update on the time it takes to go 360 degrees. It is almost a certainty that this technology is what the next NWS network will be. The holdups right now are finding ways to make the dual-pol variables more robust and, of course, cost.