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RE: [OT] [Possibly] WiFi WLAN update..
- To: <ukha_d@xxxxxxx>
- Subject: RE: [OT] [Possibly] WiFi WLAN update..
- From: "Nikola Kasic" <nikola@xxxxxxx>
- Date: Sat, 6 Jul 2002 13:59:48 +0100
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
Binocular with bearing could be a problem (it needs compass or
gyro), but
distance shouldn't be a problem.
Almost
any military binocular has ticks (I don't know what the proper expression
is) on
it and it's used for determining distance.
You
pick an object of known size (like door hight, or building size) and see
how
many "ticks" it fits. Each tick is 1meter over distance of 1,000 meters and
then
you need a bit of mathematics...
E.g.
if
object is 1 meter wide and it fits 2 ticks, then the distance is 500
meters.
That's
what they tought us...
Nik
For the serious
distance kings amongst us ;)
We have confirmed that we have LOS
between
my house (NS784625 as it happens)
and my mate Scott's (NS658678) That's
13,920 metres away, on a bearing of
294 degrees.
I got this
information (afte much mucking around with A supremely cool tool
I got
from
here..
http://www.bootsacrossscotland.org.uk/Site/Resources.html
takes
two OSGB Grid References, and calculates distance and bearing...
well
useful.
This chart I also found on my travels...
http://www.orinocowireless.com/upload/documents/Ranges.htm
which
gives the sort of ranges you can expect with good atmospherics
using
various Antenna powers.
These guys...
http://www.fab-corp.com/index.htm
sell
parabolic grid 19dbi antennas for only $49.99 USD, and Orinoco
pigtails
for
$21-23 USD dependant on length.
I found myself *really* wanting a
bit
of sci-fi kit for this project.
A set of binoculars with a HUD,
which
displays the exact bearing you are
looking, like Luke Skywalker uses in
Star Wars. A range finder would be
nice
too.
:D
Ian.
For more
information: http://www.automatedhome.co.uk
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