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Thanks. We changed to that from http://www.quora.com/How-does-a-fighter-jet-lock-onto-and-ke... since there were so many complaints about the latter.
So the average bastard who reads Hacker News still gets to read the content? Your hypocrisy is just amazing.
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So the average bastard who reads Hacker News still gets to read the content? Your hypocrisy is just amazing.
I'm having trouble parsing this. What is the problem, exactly?
Apologies for the abusive word used.
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This one got reposted to Gizmodo, with a saner interface. http://gizmodo.com/how-fighter-jets-lock-on-and-how-the-targ...
Thanks. We changed to that from http://www.quora.com/How-does-a-fighter-jet-lock-onto-and-ke... since there were so many complaints about the latter.
We don't mind the change of link - we just want knowledge shared on Quora to get to as many people as possible and we don't mind if it happens on other sites. But I wanted to let you guys know that this was a bug and the behavior is back to normal (nothing with share=1 will ever require viewers to sign in / trigger this level of complaints). There can be so much negativity here that it can be hard to tell the difference between general hate (as radmuzom suspected) and a real problem, but in this case it was a real problem.
Good response, worth the read. Heck the response alone could justify their own article. As an aside: I hate quora' site design so much I have blacklisted it using Google Personal Blocklist. Somehow I dislike it more than Experts Exchange (which is also blacklisted), it is just super cluttered with nonsense, rolls into the comments section without warning and rarely offers good content (see Experts Exchange again). Th…
This was a great read until I reached the truncated bottom of the post. God I hate Quora. There's the `share=1` flag but still, the end of the article is truncated and you're asked to login. Quora wouldn't piss me off so much if they were not so annoying about me logging in and linking a social account, if they didn't post crap from my friend's facebook account who do have an account, send me spam about whatever peop…
Hmmm, I was kind of hoping for an explanation of how the control system determines how to modify the highly directional antenna's orientation to continue to maximally "illuminate" the target once it's been selected from a general scan. Can anyone describe the solution to this? Example idea: Once selected for "lock," the antenna scans in small circles and migrates its central point toward the point on the scanned circ…
There is a book on it[1]. But suffice it to say that the radar is computing an "exit vector" when the target it moving away from center and applying a correction to the pointer. I built a similar system with LEDs when building a tracking system for two moving robots. In my case I used a parabolic dish (a solar cigarette lighter) and a line of LEDs (bar graph display) as detectors rather than lights. Since the target…
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Are you asking if the antenna gets moved to illuminate the target once acquired? I apologize if I misunderstood. If that's the case, the antenna is a solid state phased array; no movement is required. Mobile communications (cellular and satellite) spot beams work under the same principal. http://www.northropgrumman.com/Capabilities/MESA/Documents/a...
Of course some radars did physically move their dishes to stay locked on to a target. I'm in the middle of The Invention That Changed the World (spoiler alert: it was radar) and I was stunned to learn how well this worked with analog circuits. An SCR-584, paired with an M9 analog computer, could detect that a plane was moving out of the center of its conical scan, and then convert that into a signal to the motors tha…
Yeah phased arrays have probably been the rule for decades at that price-no-object level.
Even at the consumer level, there have been phased-array marine -sonars- (e.g. Interphase brand product line) for at least ten years for "only" 4-digit prices. Spatial resolution is of course tied to the number of elements but they do present more information that your typical 1-d "fish finder."