Probably about the only accurate way, really.
A GPS antenna is light weight enough that it could be
mounted to a suitable turntable clamped to the shaft of
a stepper motor. The assumed physical center of the
antenna could be mounted directly on the axis of
rotation. Then you would know accurately the angle of
rotation. If you plotted the GPS location relative to
the angular rotation, you could then know the offset
from the assumed physical center, and the real phase
center...
-Chuck Harris
Poul-Henning Kamp wrote:
--------
In message <fc02a5e8-5396-4474-a307-546e10909...@n1k.org>, Bob Camp writes:
The “put the antenna up and rotate it to see what happens” experiment
has indeed been done. The objective was not correcting the antenna’s
issues, but validating that their model of the antenna’s phase
center was correct. They were trying to see if anechoic chamber
data really gave correct answers in free space.
So this could be a realistic way for us to calibrate the phase-center
of an antenna ?
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