They’re
divided into
mils (6400 mils in as circle) I don’t know which ones you used but
the Nato
standard is divisions at 5 mil intervals.
Tim
-----Original
Message-----
From: Nikola
Kasic [mailto:nikola@xxxxxxx]
Sent: 06 July 2002 14:00
To: ukha_d@xxxxxxxSubject: RE: [ukha_d] [OT] [Possibly]
WiFi WLAN update..
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...
if
object is 1 meter wide and it fits 2 ticks, then the distance is 500
meters.
That's
what they tought us...
-----Original
Message-----
From: Ian
Lowe
[mailto:ian@xxxxxxx]
Sent: 28 June 2002 11:39
To: UKHA Mailing List
Subject: [ukha_d] [OT] [Possibly] WiFi
WLAN update..
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.
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