Cylindrical positions of NH echoes (see Fig. 19) for the best‐fit inclination of 40° south and 6﹩\fdg﹩5 east. Symbols are the same as Fig. 29. We assume NH is symmetric about the equator, and plot ﹩\vert z^{\prime }\vert ﹩. The solid line is the best fit through all points.
