unless you’re communicating by waving glowsticks, it’s passive radar
Comment on Sign language is just radio communication but on another frequency
jonatan83@lemmy.fmhy.ml 11 months agoAlas, RADAR relies on transmitting and then reading the reflected waves.
skillissuer@lemmy.world 11 months ago
astrsk@kbin.social 11 months ago
RADAR: RA(dio) D(etection) A(nd) R(anging)
It doesn’t rely on self transmission. It can but you can detect and range other sources without generating it yourself.
jonatan83@lemmy.fmhy.ml 11 months ago
That’s just what the acronym means, it doesn’t describes the actual process. I don’t think there is a single RADAR that doesn’t have a transmitter. At that point it would just be a… radio.
Atrabiliousaurus@lemmy.world 11 months ago
Passive radar?
jonatan83@lemmy.fmhy.ml 11 months ago
Fair enough, though I would argue that’s a very specific subtype of radar and anyone saying “radar” refers to the type that is used in 99.999% of the cases.