Angle Accuracy (Milligon)

[Ben Lund]

Our total station specs say: "Angle Accuracy: 5/1 mgon"

I found that 1 mgon = 0.0009 Degrees = 3.24"

Does this mean the angle accuracy of the gun is (5)(3.24") = 16.2". Something doesn't seem right here.

[Jim Frame]

Something doesn't sound right -- the "5" doesn't seem to go with the "1 mgon." 3"/1 mgon, or 5"/1.5 mgon, would be more consistent with popular instruments.

What make/model, and from what document did the specification come?

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[Ben Lund]

It's the Leica TCR705.

Specs came from here: http://www.alibaba.com/product-free/106 ... ation.html

[Anthony Maffia]

Angle accuracy: 5”/1 mgon

http://www.ec21.com/product-details/Lei ... 51249.html

[Ben Lund]

So what does this angle accuracy mean? ""Angle Accuracy: 5"/1 mgon"

[Ben Lund]

So when I turn an angle, how accurate is my reading?

[ktwtom]

Like Otter said. You can be 99.7% sure you are within 15" 95% sure your are within 10" and 68.3% sure within 5".

[E_Page]

McComb

Rimshot!

[Ben Lund]

Thanks to Otter and ktwtom for setting me straight. I originally thought the fraction 5/1 was some sort of ratio or angle error as a function of angle size. Now I see it's just representing two angle units. Thanks again!

[dmi]

Most specs show standard error per pointing... 2 pointings per angle so it is 7" not 5" and then consider confidence level..... If I do not have this right I sure may error will be pointed out.