[ntp:questions] Indirect GPS time source options

William Unruh unruh at invalid.ca
Thu Mar 13 19:09:44 UTC 2014

On 2014-03-13, Hal Murray <hal-usenet at ip-64-139-1-69.sjc.megapath.net> wrote:
> In article <lfqeb1$m6$5 at dont-email.me>,
>  William Unruh <unruh at invalid.ca> writes:
>>CDMA also needs an antenna with cell tower view. What's the difference? 
> 1/r-squared.
> The GPS satellites are way up in the air.  A cell tower is a lot closer.
> You can get a signal from a cell tower into a lot of places where GPS
> doesn't work.

There are loads of places here where the cell phone signal disappears.
The gps signal is there everywhere outside. Agreed that in favourable
circumstances, the cell signal may penetrate into the building much
deeper, but it can also be non-existant even outdoors. 


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