nSide2nPix

Convert HEALPix resolution parameter to number of pixels on sphere

Contents

Syntax

nPix = nSide2nPix(nSide)

Input Arguments

nSide    sub-divisions of facet sides. May be an array.

Return Arguments

nPix     size(nSide) number of pixels on sphere corresponding to nSide

Description

HEALPix divides the sphere into 12 basic facets. Each facet is further divided into nSide sub-divisions for a total of 12*nSide^2 pixels.

Example

nSide = 2.^[1:4];
nPix = nSide2nPix(nSide)
nPix =

          48         192         768        3072

See also

nPix2nSide

Copyright 2010-2011 Lee Samuel Finn. Terms of Use.