[57north-discuss] Locating Radio Beacons

[Calum Enterobsidian]

The MRCC use a geographical based direction finder system on HF, If my current trip hasn't driven me mad beyond reason. It compares the signal level at different antennas spaced out along the coast, and from that they use a similar principle to a Vein diagram to work out where the signal is coming from. It would require a minimum of 3 stations with known coordinates in a given grid, but it can be done without any relative boundaries using this method.
 
Hope this helps
Calum
(somewhere in the grey and dull North Sea)

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Date: Thu, 22 May 2014 15:55:49 +0100
From: d at vehibberd.com
To: martin at caggy.co.uk
CC: 57north-discuss at lists.57north.co
Subject: Re: [57north-discuss] Locating Radio Beacons

Interesting indeed - I'd be curious to learn more, and if/how it differs
from the "popular" subhobby within amateur radio, radio direction
finding (much like orienteering but with yagis instead of compasses). 
 
I guess most of it depends on the definition of beacon, but it sounds
like it could be groovy fun :)
 
If we pull in edinburgh folks and I can pull in some glasgow chaps, we
could be looking at a fun cross-hackerspace project to test the
collaborative waters.
 
Hx
 
On Thu, May 22, 2014 at 03:11:29PM +0100, Martin Evans wrote:
> It's really hard to triangulate using iBeacons as the signal can vary quite a lot. I've done some work with an Arduino and a BLE Mini as a central device and am able to connect and read the rssi values from BLE devices.
> 
> Martin
> 
> 
> On 22 May 2014, at 14:08, Marcel H. <maco at blava.net> wrote:
> 
> > Although a Edinburgh's Hacklab member and not a 57North member, I am
> > currently very much looking into iBeacons / LibreBeacon.org to do
> > exactly the same thing.
> > 
> > Marcel
> > 
> > On Thu, May 22, 2014 at 1:27 PM, Iain R. Learmonth <irl at fsfe.org> wrote:
> >> Dave,
> >> 
> >> I have someone in the lab who wants to look at locating radio beacons
> >> through triangulation. This will possibly have mesh aspects to it where the
> >> beacons themselves are also trying to place the beacons around them and
> >> communicate back to a base station.
> >> 
> >> I imagine you will have helpful knowledge here. Is this something you'd be
> >> interested in?
> >> 
> >> The guy's name is Kola and he is subscribed to the 57north-discuss list.
> >> 
> >> Iain.
> >> 
> >> P.S. If anyone else on the list may have useful knowledge, you should also
> >> chime in.
> >> 
> >> --
> >> urn:x-human:Iain R. Learmonth
> >> http://iain.learmonth.me/
> >> mailto:irl at fsfe.org
> >> xmpp:irl at jabber.fsfe.org
> >> tel:+447875886930
> >> 
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