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This was just a rough idea that came into mind when thinking about high-speed missiles used in a current war. How to detect them fast enough to target quickly.
I have no idea about any of the current systems or technologies in use, or planned, or anything. But this thought, if plausible, is about augmenting current detection and targeting systems. It might be possible for this concept to provide a better result, but I am expecting, if anything, this would only produce an early alarm and very rough positional information.
However, even if only vague and rough, this might help other systems in that they can focus better based on the information.
The thought here is quadcopters position, as far apart as possible for the detection network to function, forming two vertical walls. The second one being probably less dense, and the intention is to provide additional information about the trajectory, is positioned further away from the border and the main wall, which is on the border or as near as possible.
Although an optimal distance can be achieved for the technology, there will be need for the nodes to be closer so that if one is displaced (wind, ...) or has to move to avoid an airplane or something, that it can still participate as much as possible, and the information can be used up to the point can be compensated for.
One other thought I had was that the quadcopters would actually maintain position instead of returning to base for a battery change. A refueling quadcopter docks with the unit, provides bridging power with inductive coupling, or contacts if reliable enough. Then the battery is mechanically replaced.
The concept behind this is about using disturbed radio waves for detection. So each node is maintaining one free-running oscillator for each neighbor, possibly at extremely high-frequencies.
The detection is by watching the neighbors corresponding radio signal for a phase change. And that was with the though of keeping them synchronized, compensating for drift, but without defeating detection.
However at this moment, it really looks like just tracking the phase difference, and watching for a sudden (non-drifting) change in the phase difference.
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