[time-nuts] Re: GPS antenna question

[dk4ww at gmx.net]

Hi,
put the GNSS Ant. on the ground. If you use a magnetic antenna then use a smale metal reflector on the bottom. 
Than use only Sat’s with 30deg elevation (clear sky) After 24h your location 3D Fix should be good for a proper 1PPS/ToD depends of your GNSS RX. Check DOP Value.

Thanks
Uwe 

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Am 23.07.21 um 03:01 schrieb Robert DiRosario

> If I want to use GPS for time and frequency standards, just how solidly 
> does the antenna need to be mounted?
> The easiest and least expensive way to mount a GPS antenna would be up 
> on two 10' TV mast sections, but that
> would move around a bit in the wind.  Maybe two or three inches.  Or do 
> I need to do better?  All of the "easy" or
> "good" spots in my yard already have amateur radio antennas.
> 
> A second question, and it may very between different GPS receivers, how 
> to they get the time?  Do they just take one signal
> with a good S/N number and correct for the distance from that satellite, 
> or do something more complicated with several signals?
> 
> Thanks
> Robert
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