Top: the optimal power-spectrum sensitivity weighting in fringe-rate space for the XX polarization beam of our fiducial baseline (black) is overlaid with the simple parametrization for optimal weighting (red) used in Ali et al. (2015), which excises fringe rates at risk for contamination by crosstalk, and applies a Blackman–Harris window in the time domain to generate a compact time-domain convolution kernel with regions weighted below 5% of the peak response suppressed. Also illustrated are the weightings for matching the YY to the XX polarization beam (blue dashed) and for reducing polarization leakage (blue solid) described in Section 4.2, as well as a weighting that balances the needs of sensitivity, polarization leakage, crosstalk removal, and off-axis foregrounds (green). Bottom: the time-domain convolution kernel corresponding to the red curve in the top panel. Real and imaginary components are illustrated in cyan and magenta, respectively, with the absolute amplitude illustrated in brown.