[time-nuts] Leica AT-303

[Attila Kinali]

Hoi Mark,

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?


			Attila Kinali


-- 
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