Re: Stars drift with high resolution encoders


<Joerg>
 

Dan,

 

The diameter of azimuth disk is 1174.72mm, altitude is 1268.21mm.

At round about D disk =1200mm, 1arcsec conforms to 2.9µm on tape. 1 sec tracking at sidereal rate conforms to 0.0436mm on the tape.

The magnetic tape has a pole length of 1mm and the read head is MK1-2k-R.

That should give a maximal resolution of 0.5µm.

 

Joerg

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