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djpi2() |
spherical harmonics software package, spherical harmonic transform, legendre functions, multitaper spectral analysis, Python, gravity, magnetic field |
mydoc_sidebar |
pydjpi2.html |
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pydoc |
Compute the rotation matrix d(pi/2) used in rotating data expressed in spherical harmonics.
dj = djpi2 (lmax)
dj : float, dimension (lmax+1, lmax+1, lmax+1) : The rotation matrix dj(pi/2).
lmax : integer : The maximum spherical harmonic degree of the spherical harmonic rotation.
djpi2 will calculate the rotation matrix d_{mM}^j (pi/2) that is used in rotating spherical harmonics in the routines SHRotateRealCoef and SHRotateCoef.
This routine is based on code originally written by Guy Masters.