Quote:
Originally Posted by leon
Hi Guys, yes it seems that I am asking plenty of questions this week, but I'm sure you don't mind.
This regards my Long and Lat of my position in my back yard.
At present it is the location of Ballarat, which is 37:34 South and 143:52 East,but last night I was playing around with Google Earth and put the Curser on the exact spot of my Observatory.
The reading there was 37:35 South and 143:50 East, I know that there is not much in it, but would it be a good idea to reset the coordinates in the g11 to fix this, or wouldn't it make that much difference.
Thank You.
Leon  |
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.