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MuffinSpawn / FMS

My personal FMS task management and field-testing repository.
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Correct refractive index calculation and update procedure #17

Closed MuffinSpawn closed 7 years ago

MuffinSpawn commented 7 years ago

Based on this paper: https://ojs.cvut.cz/ojs/index.php/gi/article/view/gi.14.2.2, the refractive index of the tracker should be calculated manually and updated in a special way to keep it current.

MuffinSpawn commented 7 years ago

The Czech paper describing the Ciddor & Hill calculation can be found here:

http://k154.fsv.cvut.cz/~dvoracek/doc/ciddor.pdf

I used Google Translate to get the text of this paper and will compare with the original which has unmangled equations.

MuffinSpawn commented 7 years ago

Using the Ciddor paper here:

ftp://adk.asrc.cestm.albany.edu/pub/sergey/KiedSier/Ciddor.%20Refractive%20index%20of%20air.pdf

I verified my Python calculation of nLL and get reasonable values for the phase refractive index. It shows a difference of up to 5 ppm in distance measurements between the Leica-calculated and Ciddor & Hill calculation.

MuffinSpawn commented 7 years ago

I have added support for this in the LT component.