[time-nuts] Leica AT-303
attila at kinali.ch
Thu Apr 23 07:27:37 EDT 2015
On Thu, 23 Apr 2015 07:04:04 +0000
Mark Sims <holrum at hotmail.com> wrote:
> At least with a Tbolt, they do help... and quite a bit. When I was writing
> Lady Heather's precision survey code I tested it with several antennas
> Cheap patch antennas were the worst (with maybe 5 foot errors).
This might be due to the amount of side/back-lobes the patch antennas have.
They basically relly on an (infitely) large ground plane beneath the
antenna for back-lobe surpression. And most people I know use the patch
antennas without any ground plane at all (me included).
> Some small L1 only survey grade antennas did pretty well... a couple of
> feet. They are about 6 inches in diameter and and inch thick and very
> light. I use one as my standard antenna.
Which of the L1-only antennas did well?
And do you have an explanation why the L1/L2 antennas did better,
even for the L1-only reception case?
It is upon moral qualities that a society is ultimately founded. All
the prosperity and technological sophistication in the world is of no
use without that foundation.
-- Miss Matheson, The Diamond Age, Neil Stephenson
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