Median value over 13 nights of the ratio (i.e., Stokes I over Stokes V) of the cylindrical power spectra per LST bin. We define this as a cylindrical “excess variance” power spectrum. The dashed lines indicate the 5° (the primary beam; bottom), 20° (middle), and instrumental (top) horizon delay lines, respectively. The excess variance is especially high (>5) in the wedge region below the ~20° delay line in all LST bins. The excess variance has an LST dependence and LST 09-12 has the highest excess power in the wedge region compared to other LST bins.