voacapl is the linux version of the known VOACAP software - a free professional HF propagation prediction program from NTIA/ITS, originally developed for Voice of America (VOA).
You can find the ebuild in the sunrise overlay at http://overlays.gentoo.org/proj/sunrise/browser/reviewed/sci-electronics/voacapl
In the tree now. +*voacapl-0.5.7 (19 Jun 2010) + + 19 Jun 2010; Thomas Beierlein <tomjbe@gentoo.org> +voacapl-0.5.7.ebuild, + +metadata.xml: + Initial portage version, moved from sunrise. Bug #293960 +