[amsat-bb] Re: sat-com (figured I better change the subject)
Rogerkola at aol.com
Thu Mar 27 19:14:54 PDT 2014
My cellphone carrier can detect which direction my phone is pointed very
accurately in a single location in my home. It shows on my internal
mapping function and GPS is shut off. That to me means constant
triangulation along with direction sensing within my android device...
If I'm in an accident that is good...if I do something illegal that is
Not bad for finding north to orient satellite antennas though...
That to me is scarey in itself.
On 3/27/2014 4:17 PM, Howie DeFelice wrote:
> "I bet (a small bet anyway) my cell phone carrier doesn't save receive
> frequency data accurate enough to determine what direction I am driving
> You are probably right since the doppler shift is pretty small ( at least I hope it is :) ) on a
> cellphone. The satellite access is MA-TDMA so the burst timing and frequency offset need to be tracked.
> This is a useful performance metric when troubleshooting connectivity issues in a big network.
> - Howie AB2S
> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
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“TV will never be a serious competitor for radio, because people must
sit and keep their eyes glued on the screen; the average American family
hasn’t time for it.”
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