[MLB-WIRELESS] bouncing off a survey marker on top of a hill? (fwd)

vak vak at alphalink.com.au
Fri Oct 29 21:30:37 EST 2004


Hi All,

It is highly unlikely that these could be used as anything but radar 
"markers", as they've been built to present a "known" RCS (Radar Cross 
Section). The RCS of an object is effectively its radar "signature" - 
eg, it returns a specific scattering. You will see these markers 
scattered across Melbourne and on top of certain buildings in the city.

This particular marker might be used for navigation - since it is close 
to the airport (or since there is a radar in the background, possibly 
for calibration).

Vaskos


>-------------------
>
>I'm wondering if it's feasible to passively bounce 802.11 off one of
>these:
>
>http://media.sensationcontent.com/rowan/gb-marker.jpg
>
>This was taken at Gellibrand Hill near the airport. I think it's some sort
>of survey marker; presumably that's the highest point of the hill. There's
>another hill near my new home that I can see along an easement (actually a
>dedicated water tank access road), although I haven't actually checked
>recently to see if the marker itself is visible from my block.
>
>Just a wild idea which popped into my head, I'll have a double storey
>place on the south side of my place so perhaps I could bounce off that
>thing to reach further south. :)
>
>Cheers.
>
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>.
>
>  
>


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