NavList:

Hello, Alex!

I remember I have read your posts in NavList archive. It is so great that this information is available at any time in this arhive!

Your results +/-0,2’ are excelent! I’m not sure I’ll get similar results with my newly aquired SNO-T. Last night I had an oppurtunity to take several star/star distances.  2 sets were within 0,15’ from factory corection value, but one set was off 0,45’. I took another set of the same star pair and the 0,45’ result was identical. It seems that it will be interesting to check the certificalte values.

You asked: “How stable is the error curve that you determined? Did you notice any changes in your correction curve with time?”

If I compare results from 2021 and 2022 I can see that deviation is mostly about +/-0,1’; maximum in some points — about 0,25’.

You wrote: “The Russian article that you attached to your previous post is from the book of Krasovskii, who was one of the top specialists in the matter in Soviet Union (I have the whole book).”

The author of the book is Krasavcev (not Krasovskii). The full book free download is available here 

Is this the same author?

I would like to ask you (or anybody who is competent) a question about SNO-T. In the instruction it is printed: range of angles readings 140°, range of angles measurement 120°. Certificate data range is also only 0°-120°. My SNO-M sextan also has similar angle values, but I can easily to take sights up to 135°. Why measurement range is limited by 120° while it is possible to measure larger angles?

Modris Fersters