22 Jul 2012 News for NTIA/ITS HF Propagation Models (WINDOWS version) 22 Jul 2012 1. A error in the VOACAP smoothing (Method=30) algorithm was fixed. It has been there a long time and I do not know why it just surfaced. There was an undefined variable and it surfaced as a floating point stack fault. Initially this fixed caused another problem that I fixed the next day. Sorry.