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@xxxxxxx
Subject: 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.
For more
information: http://www.automatedhome.co.uk
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