Modulus of the complex elements of the D matrix relating dipole and quasi-dipole spherical harmonics through Eq. (13), for Kmax = 45, Lmax = 5, Nmax = 60, Mmax = 12. The color scale is in powers of 10. There are N
= 475 quasi-dipole harmonics (abscissae) and N
= 1368 dipole harmonics (ordinates).