>Uh...

>Uh... the radar is showing just a small bird approaching us at 600mph. Better ignore it.
How does stealth work?

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  1. 11 months ago
    Anonymous

    >flocks of ducks flying around
    >your entire AD system is effectively jammed

  2. 11 months ago
    Anonymous

    You call the radar station ahead of time and tell them there's some 600mph birds flying around. Honestly, stealth jets are like hacking in that it's mostly social engineering.

  3. 11 months ago
    Anonymous

    Radars are generally not set to look at individual birds, otherwise displays would be uselessly cluttered at all times.

    • 11 months ago
      Anonymous

      You could just ignore objects moving below certain speeds.

      • 11 months ago
        Anonymous

        there's no continuous object on a radar screen, you just get blops on your every time you scan a certain area, then a computer tries to make sense of it and concludes that these two blobs are the same object separated by time

        if you lower the rcs (size) threshold the screen gets cluttered with shit & noise so much that the computer would no longer be able to make a connection between two blobs

        • 11 months ago
          Anonymous

          Why not just scan more frequently?

          • 11 months ago
            Anonymous

            You need better components for that, the kind not usually accessible to the people who'd really like to be able to detect and target stealth aircraft
            then you need a better computer to be able to process all that data at a higher frequency as well, same story as before

            You could be able to deduce some patterns of what is and isnt for example a f35 if you had a lot of data and knew what exactly in that data is f35, but this the reason why most of the time f35s fly with essentially "stealth spoilers" to make them completely visible and thus give no insight into their steal characteristics (picrel)

            • 11 months ago
              Anonymous

              [...]
              and a second thing is that the smaller the rcs (size) of your stealth plane is, the smaller and cheaper you can make decoys to fly with them (maybe dozens per real plane)

              so I mean sure you can lower the size threshold and scan more often, go ahead take your pick

              there's no continuous object on a radar screen, you just get blops on your every time you scan a certain area, then a computer tries to make sense of it and concludes that these two blobs are the same object separated by time

              if you lower the rcs (size) threshold the screen gets cluttered with shit & noise so much that the computer would no longer be able to make a connection between two blobs

              omg stfu you don't know shit about frick

              There are fundamental limits to what you can detect enforced by things like diffraction and thermal noise. It's not a matter of muh better components.

              To detect a tiny RCS object you need
              >short wavelengths (which may have shitty atmospheric propagation characteristics)
              >clever signal "marking" tricks like spread spectrum or muh quantum entanglement to aid in differentiating signal from noise

              • 11 months ago
                Anonymous

                >the stealth plane will have the same rcs at all distances to the radar

                ok moron
                yeah at some distance f14 will become fundamentally undetectable too

                also go explain this shit using wave-particle duality, uncertainy principle or planck limit
                see how many people will stick to read past the first paragraph

              • 11 months ago
                Anonymous

                ...what? schizo homosexual. See

                https://i.imgur.com/nkVQcus.png

                >RCS of X square meters
                doesn't mean
                >radar sees an object X square meters in size
                it means
                >the amount of energy returned by this object is the same as that of a steel ball X sq m in cross section

                Which is to say, it's too fricking small for the radar to see.

                RCS is a function of shape and material properties. Of course it's not constant with range, it's actually extremely variable with angle as well, known as specularity. But it's MOSTLY distance invariant, which is the whole point of the metric. That way you can reason about how close or far an object needs to be before you can discern it from background radiation.

                This is all besides the point. You don't seem to understand how radar works at all yet try to speak with authority. I suspect you're underage.

          • 11 months ago
            Anonymous

            https://i.imgur.com/4vvqRHH.jpg

            You need better components for that, the kind not usually accessible to the people who'd really like to be able to detect and target stealth aircraft
            then you need a better computer to be able to process all that data at a higher frequency as well, same story as before

            You could be able to deduce some patterns of what is and isnt for example a f35 if you had a lot of data and knew what exactly in that data is f35, but this the reason why most of the time f35s fly with essentially "stealth spoilers" to make them completely visible and thus give no insight into their steal characteristics (picrel)

            and a second thing is that the smaller the rcs (size) of your stealth plane is, the smaller and cheaper you can make decoys to fly with them (maybe dozens per real plane)

            so I mean sure you can lower the size threshold and scan more often, go ahead take your pick

  4. 11 months ago
    Anonymous

    Because if you turn up your radar's sensitivity enough to detect birds, you're just going to end up with a frick ton of noise.

  5. 11 months ago
    Anonymous

    How stealth works
    >radar sends signal
    >huge % of said signal doesn't come back because it's deflected or absorbed
    >radar thinks nothing is out there

  6. 11 months ago
    Anonymous

    its obviously a UFO.

  7. 11 months ago
    Anonymous

    General detection and precise guidance aren't identical; you might detect there is a probable plane somewhere over there, but actually guiding a missile to that location is not practical as the location is not precise.

    • 11 months ago
      Anonymous

      So what exactly does a radar system "see" when it picks up a potential stealth aircraft vs a normal aircraft?

      • 11 months ago
        Anonymous

        a small object moving sporadically caused by ECM jamming, a computer would probably remove it as noise. you can get around this by scanning more frequently but that takes more power and computing power along with more precise equipment

  8. 11 months ago
    Anonymous

    >what is noise
    fricking moron. finish high school.

  9. 11 months ago
    Anonymous

    >RCS of X square meters
    doesn't mean
    >radar sees an object X square meters in size
    it means
    >the amount of energy returned by this object is the same as that of a steel ball X sq m in cross section

    Which is to say, it's too fricking small for the radar to see.

    • 11 months ago
      Anonymous

      Well, can radar systems detect birds at long ranges?

      • 11 months ago
        Anonymous

        depends entirely on the radar and the material properties of the bird

        sometimes flocks get picked up as rain by weather radars, but that's looking for the radio emissions of water and its resolution is much too low for actual target tracking

        • 11 months ago
          Anonymous

          i should also add that the material properties being looked for by the radars being used for this purpose are strongly implied to be metal given the use of steel balls as a stand-in for return cross-section

  10. 11 months ago
    Anonymous

    OK, so now your screen is filled with thousands of false returns from completely nonexistent targets because your noise floor is so close to your detection threshold.

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