Typical chokerings are L1/L2 geodetic antennas. There is however "simple"
L1-only chokerings available from time to time on *bay. I have often seen
them as low as in the $50 range. Orginal use I think was for DGPS
reference stations. Most seem to be the Aeroantenna model in the url
below.
http://www.aeroantenna.com/PDF/AT575-90_G.pdf
However they have usually been rebadged by Novatel, CMC or Leica.
--
Björn
> If the satellite is above the mask, the signal will be used in computing a
> solution even if it got in through reflexions and multipath. That's why a
> good antenna with choke rings is desirable.
>
> Didier KO4BB
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