comment: >
  
  This is the best tl;dr I could make, original reduced by 63%. (I'm a bot)
  
  
  Lee said the South Korean military conducted a reconnaissance mission after the drones entered its airspace, with some assets crossing into North Korean territory and filming its military installations.
  The last time a North Korean drone entered South Korean airspace was five years ago, according to the South Korean military.
  North Korea has aggressively ramped up its missile tests this year, firing missiles on 36 separate days, the highest annual tally since Kim Jong Un took power in 2012, according to CNN. On Friday, South Korea said North Korea launched two short-range ballistic missiles, according to CNN..
  
  
  Extended Summary | FAQ | Feedback | Top keywords: Korean^#1 South^#2 drone^#3 Korea^#4 North^#5
context: They better shoot down those drones. >
  
  Ukrainians use this little signal shooter to disable a UAV's rotors and bring it down to the ground. How does South Korea not have this tech yet? >
  
  Those signal shooters only work against radio controleld drones. If they have a preprogrammed flightpath they [edit:BurnoutEyes has a point] ~~don't~~ might not do anything. Edit: Depends on the jamming systen of SK and drone navigation of NK. 
  If those were small propelor spy drones, then wasting patriot missles on them is an absolute waste.
  Until we know what kind of drones North Korea used, it's hard to say what South Korea could to better. >
  
  
  If they have a preprogrammed flightpath they don't do anything.
  
  Some of them try to interfere with the crystal oscillators and clock distribution networks. >
  
  How do they do this? >
  
  They blast a bunch of directional RF at it tuned to different harmonics of the oscillator in an attempt to mess up the PLL. The higher frequencies of the harmonics have shorter wavelengths and can get into PCB traces. It only takes a little decoherence to fuck it all up.
  They decided to violate Part 15 of the FCC rules really hard. >
  
  It recquires atleast 30 metric buttloads of power to actually cause harm to a physical component from a few hundred meters
  Theres a reason wireless charging is shite even from a few milimeters away its only 70% as effective as just having wires >
  
  You don't need to burn out the transistor, you only need to cause enough ripple in clock lines to cause them to stay open or closed a bit longer than they should. Digital electronics require carefully synchronized clock distribution networks.
  The principle you're referring to is the inverse square law by the way. Funny enough in radar the effect gets applied a second time to the return path, so it's way worse for signal strength than you'd think, yet transistors pick those up still. Digital electronics are really sensitive. >
  
  Inverse-square law 
  
  In science, an inverse-square law is any scientific law stating that a specified physical quantity is inversely proportional to the square of the distance from the source of that physical quantity. The fundamental cause for this can be understood as geometric dilution corresponding to point-source radiation into three-dimensional space. Radar energy expands during both the signal transmission and the reflected return, so the inverse square for both paths means that the radar will receive energy according to the inverse fourth power of the range.
  
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