We study the problem of globally stabilizing through saturated smooth time-varying measurement feedback a class of time-varying systems with measurement noise and uncertainties having an upper triangular structure (feedforward form). We propose a novel step-by step design, based on splitting a n-dimensional system /spl Sigma/ into n one-dimensional systems /spl Sigma//sub j/, j=1,..., n, finding a smooth time-varying measurement feedback controller C/sub j/ for each system /spl Sigma//sub j/, and selecting the parameters of each C/sub j/ in such a way that altogether the controllers C/sub j/, j=1,...,n, give a controller for the overall system /spl Sigma/. We apply these results to a three-dimensional system in chained form with uncertainties and disturbances with finite energy.