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What is True North?

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j-penry
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Yesterday's (March 4) Real Life Adventures cartoon.


 
Posted : March 5, 2015 5:12 am
nate-the-surveyor
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Must be slightly west of the Central Meridian, of his state!

🙂

N


 
Posted : March 5, 2015 7:18 am
Dave Ingram
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Whatever I say it is!


 
Posted : March 5, 2015 7:43 am
Cliff Mugnier
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CIO = Conventional International Origin (with respect to observations of Chandler Motion). See: [email protected]


 
Posted : March 5, 2015 12:43 pm
George Matica
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[sarcasm]The opposite of True South...[/sarcasm]


 
Posted : March 5, 2015 12:51 pm

john-nolton
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Cliff you are only about 15 years behind times. CIO DOES NOT MEAN Conventional International Orgin.

It now ( and has been for around 15 years) stand for " Celestial Intermediate Origin"
see page M3 of "The Astronomical Almanac year 2015"

Note: If one was to apply the pole corrections to their 1st order Azimuth it would only amount to about 3/10 of a second of arc (max).

Does anybody on this board do a 1st order azimuth determination?
1st order and 2nd order class 1; 16 D&R on 2 different nights (using a 1st order Theodolite , Wild T3 or Kern DKM3 or better). Standard deviation of the mean 0.45 seconds.

JOHN NOLTON
Tombstone, AZ.


 
Posted : March 5, 2015 7:41 pm
skwyd
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While both the North Pole and South Pole are interesting places that probably hold a lot of significance, I prefer to follow in the wise words of Winnie the Pooh and simply go by the East Pole.


 
Posted : March 6, 2015 6:30 pm
dave-lindell
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I followed Horace's advice and went west, young man.


 
Posted : March 6, 2015 6:40 pm