... isn't that just how radar works? A radio emission is sent out, bounces off an object, and then detectors measure the difference?
The fact that this works from the sky is definitely new, but I think all radar is light speed by definition.
this post was submitted on 02 Dec 2024
11 points (73.9% liked)
Technology
35129 readers
145 users here now
This is the official technology community of Lemmy.ml for all news related to creation and use of technology, and to facilitate civil, meaningful discussion around it.
Ask in DM before posting product reviews or ads. All such posts otherwise are subject to removal.
Rules:
1: All Lemmy rules apply
2: Do not post low effort posts
3: NEVER post naziped*gore stuff
4: Always post article URLs or their archived version URLs as sources, NOT screenshots. Help the blind users.
5: personal rants of Big Tech CEOs like Elon Musk are unwelcome (does not include posts about their companies affecting wide range of people)
6: no advertisement posts unless verified as legitimate and non-exploitative/non-consumerist
7: crypto related posts, unless essential, are disallowed
founded 5 years ago
MODERATORS
looks like the innovation here is with using ELF spectrum which penetrates seawater
I figured something cool was happening to allow them to use radar from the air. So it's not even radar, it's like, ELFdar.
Really weird they went for the "lightspeed" angle tho
for sure, I find most of the time science reporting actually makes it harder to understand what the tech does rather than explain it
In the spirit of dumbing down the plot to make sure viewers don't turn away, they end up making totally nonsensical (if not misleading) content.
I suspect that a lot of the time people doing science reporting have a fairly tenuous grasp on the subject themselves as well.
RF is still RF, the only difference between what they're shooting into the water to detect subs and what you're shooting into your hot pockets is output power and frequency. It's still radio detection and ranging, just at a frequency not typically used for it. Microwave frequencies are used for what one would consider to be typical radar applications, while extremely low frequency would be better suited for communications.
Infrared isn't red, though. Seems like it's worth making a distinction between different frequencies if the way it interacts with matter is different.