[ARC5] FCC General exam

[Dennis Monticelli]

I guess it depends upon how one looks at it.  There is but one F layer at
night.  Some books describe it as a merging of F1 and F2, some describe it
other ways.  I probably should have just said the night time F layer
without subscripts.

Dennis AE6C


On Sun, Nov 24, 2013 at 6:27 PM, Fuqua, Bill L <wlfuqu00 at uky.edu> wrote:

> 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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