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 3.30; October 8, 2015
http://healpix.sf.net
Version 3.30, 2015-10-08