MAVEN observations of an SIR from 26–28 August 2016. From top to bottom: (a) MAVEN spacecraft altitude, (b) ion energy spectra, (c) electron energy spectra, (d) IMF strength (B), (e) elevation angle (θ) and (f) azimuth angle (ϕ) of field direction, (g) proton bulk velocity (V_p), (h) proton number density (N_p), (i) proton temperature (T_p), (j) proton β (the ratio of proton thermal pressure to magnetic pressure), (k) proton total perpendicular pressure (P_t), (l) proton specific entropy (S _p),and (m) corresponding dynamic pressure (Pdy). Two vertical dashed blue lines indicate the leading and trailing boundaries of the SIR; the vertical dashed red line marks the SI.