UKC

http://news.bbc.co.uk/1/hi/england/cornwall/6719639.stm

Ok it's only over a small area, but they can do it anytime they like!

In reply to toad:


the yanks have always been able to do it by messing up the satelites themselves.

This sounds more like they are just going to transmit lots of crap on the frequency. More to the point anyone could do it with the right resources.

saw a cool article a while back about tracking stealth planes using the empty space in normal transmissions (eg tv etc).

In reply to dissonance: could you enlighten us? sounds interesting! *snigger*

In reply to dissonance:

That was one of the original justifications for Galileo, though an academic GIS/GPS nerd/mate says that Road pricing schemes can't work effectively using GPS and are dependent on Glalileo being properly implemented

In reply to dissonance:

Endemol?

In reply to dissonance:

You can detect meteors using an ordinary broadcast receiver distant weak FM stations that suddenly vary in signal strength as the meteor ionisation trails momentarily provide a reflection path for the signals.

In reply to toad:

Just checked the Heavens Above website and it would seem to be a very good week for watching the ISS passing to the South of the UK

For Cumbria seems about 2255 tonight crossing Eastwards in the south of the sky

In reply to dissonance and Gaz Lord:

I read something similar, they used a satelite to peer back down to earth, monitoring the radio emissions from mobile 'phones. As the stealth planes flew past the absorb the radio waves and show up a quite spots on a noisy background.

In reply to Billy the fish:

one of the origins of the idea of radiolocation and ranging came from scientists becoming aware that radio/tv signals were affected by aircraft overhead

there is a reference here

http://www.doramusic.com/Radar.htm

In reply to toad:

Interesting that the forces are relying so much on GPS! NATO forces could never understand why Warsaw Pact forces relied so heavily on flags to communicate during exercises...until they realised under Nuclear War almost all radio communications are totally destroyed rendering most electronic means worthless...

P

In reply to Pete W:

That is if the Chinese haven't shot the satellites down first

In reply to woolsack:
nuclear protection diodes, designed to protect innards from ionising radiation

In reply to Pete W:

Well Russia has Glonass so it doesn't need GPS.

In reply to GrahamD:

snigger - its like the World Series. It works anywhere in the world, so long as your in chechnia

In reply to toad:

It works a lot more widely than that !

In reply to Gaz lord:

i cant remember the exact details, but as i recall it worked by putting up multi receivers and then tracking the interference (if it disappears get suspicious).
Also vaguely remember something about buggering up GPS by hacking around with microwave ovens.

In reply to Anonymous:


Not only that, but you can use this ionised trail to improve VHF communication; you can get much increased trsnamission range during one of these events. Called 'meteor burst communications'.

http://www.radio-electronics.com/info/propagation/meteor_scatter/meteor_sca...


Aka NEDs

http://news.thomasnet.com/fullstory/10792/2534

cf TREE

http://www.stormingmedia.us/43/4372/A437203.html

In reply to captain paranoia:

not to mention Auroral propagation even ...

the equipment I came across is older than your protection references - made in the late 80s, must be newer technology