[editor-surveyor]

Thje ephemeris sent is the same to all receivers.

If you hook you handheld up to your PC, and download the data, you could calculate your own polar plots from it

[Errant]

Mine isn’t nearly sensitive enough. IIRC, we’re talking distances measured in cm (I could be wrong about this). +-30’ is about all mine is capable of.

[Errant]

Should have pinged you on the discussion considering your background, and I'm not sure if delchinate and I are talking about the same "wobble". He may be referring to the earth's precession. I'm talking about what's referred to as the Chandler wobble. According to Wikipedia, it varies by about 9 meters (but we seem to have exceeded that now). I was correct about the 14 month cycle.