Simulated coronal streamer structures at 3.0 R_☉, CR 1908–1913. (a) East limb maps. (b) West limb maps. The intensities K_tot = K_tan + K_rad were computed by assuming the electrons to be concentrated in a 5° wide layer around the current sheet (see Fig. 7) and integrating the Thomson scattered radiation along the line of sight. The differences between the east and west limb maps are caused by the tilt of the Sun's rotation axis relative to the sky plane, which reaches its maximum value of 7° during CR 1913 (1996 August 22 to September 18), with the north pole pointing toward Earth.