HOME | DOWNLOAD | DOCUMENTATION | FAQ |
> Home > Documentation > Python > Utilities
DHaj
Compute the latitudinal weights used in the Driscoll and Healy (1994) spherical harmonic transform.
Usage
aj
= DHaj (n
)
Returns
aj
: float, dimension (n
)- The latitudinal weights used in the spherical harmonic transform.
Parameters
n
: integer- The number of samples in latitude used in the spherical harmonic transform. This must be even.
Description
DHaj
will calculate the latitudinal weights used in the spherical harmonic transform of Driscoll and Healy (1994; equation 9). The number of samples n
must be even, and the transform and its inverse are implemented as SHExpandDH
and MakeGridDH
, respectively. It is noted that the first element, corresponding to the north pole, is always zero. The element corresponding to the south pole is not included.
Reference
Driscoll, J.R. and D.M. Healy, Computing Fourier transforms and convolutions on the 2-sphere, Adv. Appl. Math., 15, 202-250, 1994.
See also
shexpanddh, makegriddh, shexpanddhc, makegriddhc
> Home > Documentation > Python > Utilities
Laboratoire Lagrange | Observatoire de la Côte d'Azur | © 2016 SHTOOLS |