Quote:
Originally Posted by Kokatha man
Hi Leon - haven't a clue what the g11's accuracy is (fully compensated, that is) but a bit of quick maths indicates your original coordinates were 99.98% accurate with regard to longitude and 99.95% accurate with regard to latitude - both percentages calculated in regard to minutes of arc using the Google coords as accurate.....
This equates to an error of 0.012 seconds of arc in longitude and 0.03 seconds of arc in latitude: even if your set-up is on a rock solid pier I can't imagine these sort of figures having any influence - especially when you consider the differential expansion rates of the various elements (temperature wise, that is) in the pier/mount assembly etc....!
Regards, Darryl.
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This is correct provided both sets of coordinates refer to the same map datum (reference grid, not unlike J2000 and B1950 for RA/Dec) - do not take that for granted though...