A couple of years ago I picked up a surplus Aeroantenna choke-ring GPS
antenna that I think was intended for surveying use. I finally got it
installed today and noticed that it has an arrow on the bottom
indicating that the antenna should be oriented with the arrow facing north.
I'm trying to figure out why an omnidirectional antenna should care
about which way it is oriented. The best I can figure is that perhaps
it is for repeatability in surveying, so that any minor offset in the
phase center would remain consistent when moving the antenna from site
to site.
Does anyone have a better answer?
John
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