nside2npweights

Function to return the number of pixel-based weights (in compact form) for a given Nside:

$$N_w=\frac{(N_{\mathrm{side}}+1)(3N_{\mathrm{side}}+1)}{4} \simeq \frac{N_{\mathrm{pix}}}{16}$$

Location in HEALPix directory tree: src/f90/mod/pix_tools.F90 

FORMAT

var=nside2npweights( nside )

ARGUMENTS

name & dimensionality	kind	in/out	description
nside	I4B	IN	the $N_{\mathrm{side}}$ parameter.
var	I8B	OUT	the number of template pixels $N_w$.

EXAMPLE:

use healpix_modules
integer(I8B) :: nw8
nw8 = nside2npweights(256)

Returns in nw8 the number of non-redundant HEALPix pixel-based weights (49408) for the resolution parameter 256.

RELATED ROUTINES

This section lists the routines related to nside2npweights

unfold_weightsfile

reads of FITS file containing a list ring-based or pixel-based weights into a full sky map