  U-band observations with the LSST have yet to be fully optimized in cadence.
The straw man survey design is a simple coverage of the medium-deep-fast
survey. Here we argue that deep coverage of the four deep drilling fields
(XMM-LSS, ECDFS, ELAIS-S1 and COSMOS) has a much higher scientific return,
given that these are also the target of the Southern Hemisphere's Square
Kilometer Array Pathfinder, the MeerKAT specifically, deep radio observations.
