03 Sep 2007 News for NTIA/ITS HF Propagation Models (WINDOWS version) 03 Sep 2007 1. VOACAP and ICEPAC point-to-point programs had a problem when running Run/Graph with Method=30 and multiple groups. Only the first group used Method=30, the rest of the groups used Method=20. This has been fixed. 2. Two new Man-Made noise levels have been added, Noisy & Quiet. The following are the 6 available levels: Level Model Equation Value @ F = 3MHz 1 = Industrial = -27.7Log(F) + 76.8 = -140.4 dBw/Hz 2 = Residential = -27.7Log(F) + 72.5 = -144.7 dBw/Hz 3 = Rural = -27.7Log(F) + 67.2 = -150.0 dBw/Hz 4 = Remote = -28.6Log(F) + 53.6 = -164.1 dBw/Hz 5 = Noisy = -37.5Log(F) + 83.2 = -138.7 dBw/Hz 6 = Quiet = -29.1Log(F) + 65.2 = -152.7 dBw/Hz For some reason in 4/13/07 I changed the value for Remote from -28.6 to -27.7. I cannot remember why I did that, but I have a comment that says I did it to match the ITU report. But the latest ITU report has the value at -28.6. So I changed it back and made these values more explicit in the code and the Help information.