The beam transfer function (BTF, left) and beam impulse response (BIR, right) simulated at 100 kHz (solid black line) and a cubic spline interpolated to 100 kHz from data sampled at 781 kHz (dashed black line) for a random layout SKA-Low station, evaluated at zenith. The BIR is truncated to 1500 ns. The BTF residual was initially calculated in volts and subsequently converted to dBV, whereas the BIR residual represents the Fourier transform of the power difference.