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It’s not possible to track ordinary cell phones this way. They’re tracking stuff that is much higher energy afaiu. Yes, “cell phones” but like, satellite ones.
by leoh 3y ago
It’s not possible to track ordinary cell phones this way. They’re tracking stuff that is much higher energy afaiu.
Yes, “cell phones” but like, satellite ones.
- livueta 3y agoThey claim to be able to track FRS ptt radios, which implies a sensitivity to .5w transmissions, and iirc a phone will put out max .2w (on 4g). Lower, yes, but not massively so, so if it really does work on FRS I wouldn't be shocked if it worked on a conventional smartphone. The phone operating in a higher frequency range than ~470mhz frs/gmrs is admittently an additional challenge, but since the thing runs up to 15ghz I wouldn't count on it being unable to track a phone
- stackskipton 3y agoDepends on radio but FRS are now allowed up to 2W on lower/GMRS channels.
- deleted 3y ago[deleted]
- sroussey 3y agohttps://lynk.world/ https://lynk.world/ And AST and Starlink are all working on it for consumers which is far more complex (actually pushing a 5G signal to the phone and getting a response back in orbit). Just identifying that there is a phone transmitting is far simpler.
- leoh 3y agoThis is just an incredibly confused comment. 5g simply does not allow for transmission distances of 200+km. Period. They might make some kind of addition to the 5g standard or something. Because yes, indeed, there are such things as satellite phones and satellite internet. Please consider being more technical here and instead of just believing a random website or parroting one of Elon's audacious claims (of which its hopefully become painfully clear that none can be taken as truth on face value).
- sroussey 3y agoI’m, no. They can get the signal. I’ve spoken with them and the issues they have is more about red shift type effects of the satellites not being geosynchronous, and not being able to alter the phones designs but meet what’s on the market.
- KaiserPro 3y agoOk, so some shit maths: assuming a phone transmits 0.5watts at 1m, inverse square law[1] says that it will be 0.0000000000125 watts at a distance of 200km. Thats -79dbm, so kinda shitty wifi level of signal. GPS by contrast is -125 dbm. (logarithmic scale) Your phone can pick out a GPS signal reliably with a tiny chip antenna. Imagine having a 4 meter phased antenna array. [1] https://www.omnicalculator.com/physics/inverse-square-law https://www.omnicalculator.com/physics/inverse-square-law