The two ANDE satellites are nearly perfect spheres; this was done to make the drag on the satellites independent of their orientation, and because the drag coefficient, optical cross-sections, and radar cross sections of spheres are well understood.
To ensure consistent drag forces regardless of orientation, the ANDE satellites were designed to be almost perfectly spherical. This design choice also simplifies calculations involving drag coefficient, optical cross-sections, and radar cross sections, which are well-documented for spheres.