162
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
this post was submitted on 22 Jan 2024
162 points (97.1% liked)
World News
46621 readers
1465 users here now
A community for discussing events around the World
Rules:
-
Rule 1: posts have the following requirements:
- Post news articles only
- Video links are NOT articles and will be removed.
- Title must match the article headline
- Not United States Internal News
- Recent (Past 30 Days)
- Screenshots/links to other social media sites (Twitter/X/Facebook/Youtube/reddit, etc.) are explicitly forbidden, as are link shorteners.
-
Rule 2: Do not copy the entire article into your post. The key points in 1-2 paragraphs is allowed (even encouraged!), but large segments of articles posted in the body will result in the post being removed. If you have to stop and think "Is this fair use?", it probably isn't. Archive links, especially the ones created on link submission, are absolutely allowed but those that avoid paywalls are not.
-
Rule 3: Opinions articles, or Articles based on misinformation/propaganda may be removed. Sources that have a Low or Very Low factual reporting rating or MBFC Credibility Rating may be removed.
-
Rule 4: Posts or comments that are homophobic, transphobic, racist, sexist, anti-religious, or ableist will be removed. “Ironic” prejudice is just prejudiced.
-
Posts and comments must abide by the lemmy.world terms of service UPDATED AS OF 10/19
-
Rule 5: Keep it civil. It's OK to say the subject of an article is behaving like a (pejorative, pejorative). It's NOT OK to say another USER is (pejorative). Strong language is fine, just not directed at other members. Engage in good-faith and with respect! This includes accusing another user of being a bot or paid actor. Trolling is uncivil and is grounds for removal and/or a community ban.
Similarly, if you see posts along these lines, do not engage. Report them, block them, and live a happier life than they do. We see too many slapfights that boil down to "Mom! He's bugging me!" and "I'm not touching you!" Going forward, slapfights will result in removed comments and temp bans to cool off.
-
Rule 6: Memes, spam, other low effort posting, reposts, misinformation, advocating violence, off-topic, trolling, offensive, regarding the moderators or meta in content may be removed at any time.
-
Rule 7: We didn't USED to need a rule about how many posts one could make in a day, then someone posted NINETEEN articles in a single day. Not comments, FULL ARTICLES. If you're posting more than say, 10 or so, consider going outside and touching grass. We reserve the right to limit over-posting so a single user does not dominate the front page.
We ask that the users report any comment or post that violate the rules, to use critical thinking when reading, posting or commenting. Users that post off-topic spam, advocate violence, have multiple comments or posts removed, weaponize reports or violate the code of conduct will be banned.
All posts and comments will be reviewed on a case-by-case basis. This means that some content that violates the rules may be allowed, while other content that does not violate the rules may be removed. The moderators retain the right to remove any content and ban users.
Lemmy World Partners
News !news@lemmy.world
Politics !politics@lemmy.world
World Politics !globalpolitics@lemmy.world
Recommendations
For Firefox users, there is media bias / propaganda / fact check plugin.
https://addons.mozilla.org/en-US/firefox/addon/media-bias-fact-check/
- Consider including the article’s mediabiasfactcheck.com/ link
founded 2 years ago
MODERATORS
Jamming= broad spectrum noise source that is louder at the frequency than the signal of the transponders. In other words, a high power homing beacon that is stationary and always needs to broadcast.
"Oh look! Our drone got jammed."
"That's okay. It returns home on its own."
"Where is home?"
"The jamming beacon."
Something like that...
but it's not continuous, it's a few commonly used sections that are jammed. This way you get more range out of the same power, until somebody uses freqs in the gaps and you can't adjust. And then some are broken, some are off, some don't work, and we know that jamming doesn't always work because there was one video of bomber drone destroying jammer. If it was home-on-jam the signal would drown in noise
SDR? It has to be the largest signal in the area right?
Move to 3 points to triangulate quickly when signal is lost to noise and vector to the location regardless of continuous transmission.
I want to know why anti-drone systems are not simply using diode lasers and simple trackers to blind/fry the optics. Seems to me that a system should be about as cheap as the average drone, and they all seem to rely heavily on optical sensors.
do you have any idea how big antenna array has to be for it to have any angular resolution
Nope
you need something like square array sized at about 2 wavelengths wide, this can easily get into 50x50cm range at lower frequencies
because you have to find drone first, acquire its location and quite precisely at that, and at this point short burst of 12.7mm is more reliable. jammers don't need any directivity and work over any number of drones in area covered
Guns are heavy and slow. Light is near instantaneous and has no trajectory. A targeting laser can move extremely fast and a 360° camera with AI object recognition can pick up targets faster than any human. Targeting does not need to be accurate as a common high power diode laser can fry any optical sensor upon contact. Just aim and add a little jitter in the region of the issue. It should also be possible to use UV lasers that are outside of the visual spectrum. It is not hard to spot these with optics designed for the task, but most military optics seem to focus on IR, so UV should be much less visible while being much higher energy and causing more damage quickly. It should be possible and not require the radio emissions of a jammer.
lasers with power required would be also pretty heavy, and only as fast as operator, so about the same as AA guns
That's pretty much like Wild Weasel SEAD works. Get locked on by a SAM radar, lock your HAARM to that radar's signal and press fire🙂
You forgot the “Blyat.” As it dawns on the Russians.