The time-series phase part of the gain-calibration solutions skewness (top left), standard deviation (top right), maximum (bottom left), and minimum (bottom right) for the diagonal elements of the Jones calibration solutions before applying GRANDWin across 4 observation days. Vertical dashed lines mark the FM band limits. Outliers strongly affect these metrics across frequency. After applying GRANDWin, their values are reduced, indicating improved robustness.