09 Feb 2006 News for NTIA/ITS HF Propagation Models (WINDOWS version) 09 Feb 2006 1. All input programs have been changed to set the default FPROB for VOACAP to 1,1,1,0. This makes the default for the sporadic E (Es) to be zero (ignored). That was always VOA's recommendation. This spells it out more clearly. 2. It is also recommended to use Method 30 for ICEPAC and VOACAP instead of Method 20. Method 30 does a smoothing algorithm in the 7000-10000km range and also selects the highest signal strength beyond 10000km between the short and long path calculation methods.