It’s called the Tactical Organic Sensing System (TOSS), though Boeing is trying to change the rather unfortunate name.

One wag suggested that the radar be named Cerberus Advanced Battlespace Extension Radar (CABER).

This may very well be a winner for the various operators of V/STOL carriers, with the V-22 having better persistence and altitude performance than a helicopter based solution.

The aperture (antenna) size does appear a bit small, though it will be at least as good as the existing Sea King ASaC7.