HEALPix Fortran Facility User Guidelines
This document describes the HEALPix Fortran stand-alone facilities
Eric Hivon, Frode K. Hansen, Benjamin D. Wandelt, Krzysztof M. Górski,
Anthony J. Banday, Martin Reinecke
Revision: Version 3.11; April 24, 2013
http://healpix.sf.net
Version 3.11, 2013-04-24