• hydroptic@sopuli.xyz
    link
    fedilink
    English
    arrow-up
    49
    arrow-down
    2
    ·
    edit-2
    8 months ago

    Ahhh right, I didn’t recognize it from a photo but I’ve read of it.

    It’s annoying that so many sources are calling VERA-NG a “radar” when it’s specifically not a radar: it’s a fully passive system, it only receives and doesn’t emit. Hell, even the Wiki article is titled VERA passive sensor

    • Uriel238 [all pronouns]@lemmy.blahaj.zone
      link
      fedilink
      English
      arrow-up
      7
      arrow-down
      1
      ·
      8 months ago

      Radar can totally be passive, and if you’re flying above enemy territory, it’s a really good idea to use passive radar and not active radar (the latter of which is used for some guided missile platforms).

      In fact, active radar means everyone with passive radar knows where (and probably, what) you are.

      • hydroptic@sopuli.xyz
        link
        fedilink
        English
        arrow-up
        5
        arrow-down
        1
        ·
        edit-2
        8 months ago

        Oh interesting, although that does make complete sense. I’m an old sigs pig so I’m not too clued in on this stuff honestly

      • jimbolauski@lemm.ee
        link
        fedilink
        English
        arrow-up
        3
        arrow-down
        2
        ·
        8 months ago

        Radiolocation can be passive radar can not. Radar requires one or more transmitters and one or more receivers.

        • Uriel238 [all pronouns]@lemmy.blahaj.zone
          link
          fedilink
          English
          arrow-up
          3
          ·
          8 months ago

          One of the primary sensors on F16 (simulators in the early 1990s) was a passive radar — called that — that detected and pointed at those things trying to ping my plane.

          Since it detected transmissions outside effective range, it meant I tracked them sooner than they tracked me, much the way automotive radar detectors have different warning sounds for when they sense radar around somewhere and when the car is being pinged directly.

          Technically (the best kind of correct!) There is a transmitter in these cases, just not controlled by the same source as the detector.

          I suspect radiolocation isn’t restricted to radar signals but can track stars and radio stations. Though they too transmit.

          • jimbolauski@lemm.ee
            link
            fedilink
            English
            arrow-up
            2
            arrow-down
            2
            ·
            8 months ago

            Just because they dumbed down what a radiolocation sensor is and called it passive radar doesn’t make it a radar. RADAR was an acronym radio detection and ranging. Passive systems triangulate that is different than ranging. For ranging to work you need the transmitter and receiver to cooperate.