healpixwindow computes the space window function due to the finite size of the HEALPix pixels. The typical size of a pixel (square root of its uniform surface area) is arcmin. If a unpixelated sky has a power spectrum , the same sky pixelated with a resolution parameter Nside will have the power spectrum where is given by healpixwindow(Nside). The polarized pixel window function is also provided (when Dim > 1). This routine reads some FITS files located in the subdirectory data/ of the HEALPix distribution, unless the keyword Directory is set otherwise.
wpix = healpixwindow(256) |
wpix contains the window function in {0,...,1024} of the HEALPix pixel with resolution parameter 256 (pixel size of 13.7 arcmin)
Version 3.82, 2022-07-28