[ntp:questions] Roof antenna, which one, would you bother?

Ralph Aichinger ralph at pangea.at
Fri Jan 3 10:54:45 UTC 2014


I am currently in the process of remodeling my house
and a dedicated outdoor/roof mounted GPS antenna
would be possible to mount without excessive cost.

I probably would not see a huge difference for
timing purposes, but what would your choice of 
an outdoor GPS antenna/receiver be? I am planning
to put the NTP server (small Raspberry Pi, nothing
fancy) into a rack maybe 10 metres of cable length away 
from the roof. Or would you move the NTP host itself
to the attic and run Ethernet up?

I suppose something like the Garmin GPS 17x (mast mount
GPS with serial output and PPS, intended for the marine
market) would work fine, also be robust enough and 
cheap on the used market.

Would mounting just an antenna (active or passive) also
make sense, or would cable loss be too high? 

What would *your* roof top setup be? Cost is of course
an important consideration, on the other hand, 100
or 200 Euros for the GPS, antenna and mounting hardware
is probably OK. I would prefer to do cabling jobs now,
while I am in the process of doing a lot of "dirty" things.

Or would you not bother at all, and just put some puck into
the window (which probably works too)?

TIA
/ralph



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