Best-fitting kernel: numerically computed ACF overplotted with the best-fit Gaussian kernel for the April 9, 2019, light curve. The decorrelation timescale of the Gaussian kernel is indicated with the dashed black line. The quasi-sinusoidal oscillations at long delay are not ideally captured by the analytic form of the kernel, However, the decay to the 1/e-value at short delays is well captured and is most relevant to estimating scintillation rates.