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)
=
If it's not broken, take it to bits until it is - Enterobsidian
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Date: Thu, 22 May 2014 15:55:49 +0100
From: d...@vehibberd.com
To: mar...@caggy.co.uk
CC: 57north-discuss@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. m...@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 i...@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.
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