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The time dependence of the iSNR is computed for several different cases of exponential and Gaussian NUS applied to an exponentially decaying signal. All cases resulting in a positive iSNR slope with evolution time are colored red, showing that broad classes of even very conservative NUS densities possess this critical property. Notice also that all of the exponential and Gaussian densities have iSNR greater than uniform sampling, as required by Theorem 1.
