edenstar
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I was wondering If anyone knows if this is possible, or why it might be a silly idea.
russ_watters said:So if you want a picture WITH radio waves and not OF radio waves, then you are talking about RADAR. That's what it is.
That's still a radar picture, it would just be essentially white noise like when a TV shows static.edenstar said:If I'm correct radar takes pictures of objects be sending out radio waves and then detecting them again. What I want to do is detect the signals from radio stations or other sources that are already present. This would have little relation to the actual objects nearby.
This is called passive radar. As there are typically a few dominant sources (the active radars), I don't think pictures would be interesting.edenstar said:If I'm correct radar takes pictures of objects be sending out radio waves and then detecting them again. What I want to do is detect the signals from radio stations or other sources that are already present. This would have little relation to the actual objects nearby.
Andy Resnick said:
edenstar said:This is what I want to do:
edenstar said:Take an antenna and point it in a direction. Record the magnitude and the frequency of the radio detected. Then point the antenna in a slightly different direction and detect the same things. Do this until you have a 2d grid of these data points. Turn these grid points into an image by the proper mappings. Alternatively, you could use an array of antennas maybe but that might be impractical.