[ARC5] FCC General exam

[Fuqua, Bill L]

The F1 becomes the F layer which is the highest.
Bill 
________________________________________
From: Dennis Monticelli [dennis.monticelli at gmail.com]
Sent: Sunday, November 24, 2013 8:44 PM
To: Fuqua, Bill L
Cc: Geoff; ARC 5
Subject: Re: [ARC5] FCC General exam

Hmmm.  I was curious so I went to the ARRL antenna book (1994, Dean Straw, Editor) and it says "At night the F1 layer disappears and the F2 layer height drops somewhat."  Page 23-15.  Perhaps that book is the source of the answer pool for the exam.  But it's an ambiguous question anyway because there are multiple layers and they all change between night and day.  One could argue that with the dissipation of the D, E, and F1 layers at night, the AVERAGE height of the ionosphere increases at night.

Dennis AE6C


On Sun, Nov 24, 2013 at 3:25 PM, Fuqua, Bill L <wlfuqu00 at uky.edu<mailto:wlfuqu00 at uky.edu>> wrote:
  Well, the F1 and F2 layers are at a lower altitude in the day and merge into
the F layer at a much higher altitude at night.
  So the answer should be B.
  The propagation depends greatly on frequency.
Find some reference to the ionosphere via google or book.
73
Bill wa4lav

________________________________________
From: Geoff [geoffrey at jeremy.mv.com<mailto:geoffrey at jeremy.mv.com>]
Sent: Sunday, November 24, 2013 6:07 PM
To: Fuqua, Bill L; ARC 5
Subject: Re: [ARC5] FCC General exam

----- Original Message -----
From: "Fuqua, Bill L" <wlfuqu00 at uky.edu<mailto:wlfuqu00 at uky.edu>>
To: "ARC 5" <arc5 at mailman.qth.net<mailto:arc5 at mailman.qth.net>>
Sent: Sunday, November 24, 2013 5:10 PM
Subject: [ARC5] FCC General exam


>  Here is a question that I believe they have wrong on the General Exam.
>  What is the answer with out looking it up.
>
> G3C02 Where on the Earth do ionospheric layers reach their maximum height?
> A. Where the Sun is overhead
> B. Where the Sun is on the opposite side of the Earth
> C. Where the Sun is rising
> D. Where the Sun has just set


I would choose D. Where the Sun has just set
If discussing the E layer anyway.

Carl

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