Various parameters relating to the sheath fluctuations. (a) Normalised residual energy; (b) normalised cross helicity; (c) Alfvén and Elsässer ratios; (d) T and N velocity components; (e) proton temperature; (f) proton density; (g) specific entropy; (h) RTN magnetic field latitude angle; and (i) RTN magnetic field longitude angle, where dotted horizontal lines indicate the nominal SBs. Vertical grey lines denote the sheath boundaries, and two pink lines show the reconnection exhausts.