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Testing Direction Accuracy of Total Station

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paden-cash
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framed on the wall...

Kent,

Here's a website you might want to visit. They do have a forum and classifieds.

Vulcan Drifters

I didn't realize the 800s were carbureted.

You can always tell when the weather is going to change; it will be the day after you finally get the mixture set correctly. 😉


 
Posted : August 24, 2014 9:19 am
Kent McMillan
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framed on the wall...

> Here's a website you might want to visit. They do have a forum and classifieds.

Thanks, I'll pass that along to the know-it-all in my office. The Drifters with powder coated suspension parts and generally less chrome are definitely cooler looking. The 800 has an interesting rear suspension that looks like a rigid frame, but isn't.


 
Posted : August 24, 2014 9:47 am
rfc
 rfc
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Not quite there yet.

So far, I've got four sets of ten measurements (five F Lt and five F Rt). I've got them meaned, reduced, and got the means of each of the sets.

Next step is:

> > [pre]
> > Means of Sets 1 - 4
> > --------------------
> > Obj Direction
> >
> > 1 0-00-00
> > 2 49-54-44
> > 3 87-20-25
> > 5 123-21-43
> > 6 129-48-08
> > [/pre]
>
> Okay, so then if the above are the best estimates of the directions to each target, what were the residuals (apparent errors) in each set of observed directions listed in the first post? Given the directions from all four sets, the apparent errors, v', in the directions from a set are taken by subtracting each observed direction from the mean direction from all four sets and then adding a constant to that whole set of residuals so that the sum is 0 (the means coincide).
>

If the apparent error is v', what's v? Is v is the apparent error for face left readings and v' for face right? Take Set 4, Obj 6 for example:
Mean direction is 129-48-08. The un-reduced observed directions are 266-08-30 and 266-08-30 respectively (both the same in this instance). The apparent errors shown for that set/observation are -4 and -3.4 respectively.

I'm missing something.


 
Posted : September 4, 2014 6:47 pm
rfc
 rfc
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Anyone?

> So far, I've got four sets of ten measurements (five F Lt and five F Rt). I've got them meaned, reduced, and got the means of each of the sets.
>
> Next step is:
>
> > > [pre]
> > > Means of Sets 1 - 4
> > > --------------------
> > > Obj Direction
> > >
> > > 1 0-00-00
> > > 2 49-54-44
> > > 3 87-20-25
> > > 5 123-21-43
> > > 6 129-48-08
> > > [/pre]
> >
> > Okay, so then if the above are the best estimates of the directions to each target, what were the residuals (apparent errors) in each set of observed directions listed in the first post? Given the directions from all four sets, the apparent errors, v', in the directions from a set are taken by subtracting each observed direction from the mean direction from all four sets and then adding a constant to that whole set of residuals so that the sum is 0 (the means coincide).
> >
>
> If the apparent error is v', what's v? Is v is the apparent error for face left readings and v' for face right? Take Set 4, Obj 6 for example:
> Mean direction is 129-48-08. The un-reduced observed directions are 266-08-30 and 266-08-30 respectively (both the same in this instance). The apparent errors shown for that set/observation are -4 and -3.4 respectively.
>
> I'm missing something.


 
Posted : September 6, 2014 5:37 pm
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