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Re: Cellphones on air flight - was Comrex Remote Connections
To: CRTech <crtech@crtech.org>
Subject: Re: Cellphones on air flight - was Comrex Remote Connections
From: dave allen <crtech-mail@reyware.us>
Date: Sat, 11 Mar 2017 22:37:10 -0700
In-reply-to: <58c49f1c.9528240a.57e2d.7dde@mx.google.com>
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keep in mind that at 30,000 feet the horizon is easily a couple hundred miles away. there is no cell service 'up there'.

not trying to say why the battery drained and i'm sure it depends on the phone and software.

dave allen

On 3/11/2017 6:05 PM, Alan Kilgore wrote:
I suggest that you Google the issue.

I can see how a cellphone might receive no signal in a cave, but not so much in an airplane. The problem with that premise is that there is no shortage of signal from cell towers near the horizon via the plane windows. It's just that there is so much interference from so many cell towers at the horizon that you can't usually get a very reliable connection due to all the interference from so many towers.

Perhaps your flight was not as long as in my example so you just didn't notice a larger than normal battery drain. As I had said, it was drained after a long flight. It was like 4 or 5 hours. Alternatively, perhaps you were sitting next to the window with the cell phone well below the window's signal aperture or you had it stashed where it was shielded from window RF... just postulating.
____________________________________
Alan Kilgore, CPBE
WRVM Chief Engineer

At 12:50 PM 3/10/2017, you wrote:
I don't think the cell phone searches with wide open power until and unless it "hears" a tower in the first place, because it has nothing to respond to.  I have been on long flights where I forgot to turn off my cell phone and I haven't found my battery to be significantly down by the time I discovered it had been on.

Gary Liebisch
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References: Re: Comrex Remote Connections
(Rich Roszel <rich@creativegeniusproductions.com>, 8 Mar 2017 23:49:13 -0000)
Re: Re: Comrex Remote Connections
(Willie Barnett <wbradiolists@gmail.com>, 10 Mar 2017 14:59:35 -0000)
Cellphones on air flight - was Comrex Remote Connections
(Alan Kilgore <wrvm.engineer@gmail.com>, 10 Mar 2017 16:05:48 -0000)
Re: Cellphones on air flight - was Comrex Remote Connections
(Willie Barnett <wbradiolists@gmail.com>, 10 Mar 2017 16:15:52 -0000)
Re: Cellphones on air flight - was Comrex Remote Connections
(Gary Liebisch <glieb01@gmail.com>, 10 Mar 2017 18:50:40 -0000)
Re: Cellphones on air flight - was Comrex Remote Connections
(Alan Kilgore <wrvm.engineer@gmail.com>, 12 Mar 2017 01:06:45 -0000)
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