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djpi2
Compute the rotation matrix d(pi/2) used in rotating data expressed in spherical harmonics.
Usage
dj
= djpi2 (lmax
)
Returns
dj
: float, dimension (lmax
+1,lmax
+1,lmax
+1)- The rotation matrix dj(pi/2).
Parameters
lmax
: integer- The maximum spherical harmonic degree of the spherical harmonic rotation.
Description
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.
See also
shrotatecoef, shrotaterealcoef
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