isynfast is an interface to F90 'synfast' F90 facility. It requires some disk space on which to write the parameter file and the other temporary files. Most data can be provided/generated as an external FITS file, or as a memory array.
isynfast, '$HEALPIX/test/cl.fits', map, fwhm=30, nside=256, /silent |
mollview, map, 1, title='I' |
mollview, map, 2, title='Q' |
will synthetize and plot I and Q maps consistent with WMAP-1yr best fit power spectrum and observed with a circular gaussian 30 arcmin beam.
Version 3.82, 2022-07-28