Top: phase curves for the first several spherical harmonics with order ﹩m\geqslant 0﹩ rotated about the x-axis (blue) and about the y-axis (orange; Python). Odd harmonics with ﹩l\gt 1﹩ and harmonics with m < 0 are in the phase-curve null space (Cowan et al. 2013). Bottom: occultation light curves for the same set of harmonics. An occultor of radius r = 0.3 transits the body along the ﹩+{\text{}}x﹩ direction at y_o = 0.25 (blue) and y_o = 0.75 (orange; Python).