[time-nuts] How can I measure GPS Antenna quality?
albertson.chris at gmail.com
Sun Nov 20 19:48:45 EST 2016
If you run two antenna simultaneously then...
1) they both can't be at the same location and
2) What if the two antenna interfere one with the other.
I think maybe you need to collect data over a long enough period of tine
that wether averages out. the satellite tracks repeate pretty much exactly
What you might want to know about an antenna is more than just S/N for good
locations but how it does with adverse conditions like multi path and a
nearby jammer and maybe gain vs. elevation and also dumb practical stuff
like if birds like to perch on it and if there is a way to route the cable
through the mast pipe or not
On Sun, Nov 20, 2016 at 2:13 PM, Hal Murray <hmurray at megapathdsl.net> wrote:
> Is that even a sensible question? Is there a better way to phrase it?
> The problem I'm trying to avoid is that the weather and the satellite
> geometry change over time so I can't just collect data for X hours, switch
> the other antenna or move the antenna to another location, collect more
> then compare the two chunks of data.
> The best I can think of would be to setup a reference system so I can
> data from 2 antennas and 2 receivers at the same time. It would probably
> require some preliminary work to calibrate the receivers. I think I can do
> that by swapping the antenna cables.
> If I gave you a pile of data, how would you compute a quality number? Can
> just sum up the S/N slots for each visible/working satellite?
> These are my opinions. I hate spam.
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