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1. Re: [TowerTalk] HFTA Angles Data (score: 1): Author: David Gilbert <xdavid@cis-broadband.com>; Date: Thu, 01 Aug 2013 09:33:54 -0700; If I remember correctly, Dean Straw said that the ARRL crunched the numbers back in the mid-90's using a computer that took a few days, but I'm not sure it really matters. We're talking optimum takeo; /archives//html/Towertalk/2013-08/msg00007.html (8,772 bytes)
2. Re: [TowerTalk] HFTA Angles Data (score: 1): Author: David Robbins <k1ttt@verizon.net>; Date: Thu, 01 Aug 2013 14:05:44 -0500 (CDT); ssn to ionization density is just one part of the equation, you have to also consider layer height and even the effects of other layers than just the F layer. you should also expect voacap and other; /archives//html/Towertalk/2013-08/msg00016.html (11,118 bytes)
3. Re: [TowerTalk] HFTA Angles Data (score: 1): Author: K8RI <K8RI-on-TowerTalk@tm.net>; Date: Thu, 01 Aug 2013 16:42:51 -0400; If I remember correctly, Dean Straw said that the ARRL crunched the numbers back in the mid-90's using a computer that took a few days, but I'm not sure it really matters. We're talking optimum takeo; /archives//html/Towertalk/2013-08/msg00020.html (9,461 bytes)
4. Re: [TowerTalk] HFTA Angles Data (score: 1): Author: David Gilbert <xdavid@cis-broadband.com>; Date: Thu, 01 Aug 2013 13:57:28 -0700; I agree with all of that. I'm just not sure that the TANGLE calculation from VOACAP accurately captures all of that, and that's what the Figure-of-Merit calculations in HFTA were based upon. I recent; /archives//html/Towertalk/2013-08/msg00021.html (10,781 bytes)

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