In a message dated 29/05/01, twleiper@........ writes:

> All this talk about precision matching and ambient light,
> spectral response, etc., seems crazy. If you really must use
> a photographic system (without film on a drum) why take
> 

Dear Tom,

       Was anyone talking about photographic techniques? We were considering 
the precautions / choices necessary to get optical detection methods to work 
OK for very small movements. How would your method cope with movements from 1 
sec of arc down to maybe 1/100 sec of arc? I would be very interested to read 
your calculations.

       Regards,

       Chris Chapman


In a message dated 29/05/01, twleiper@........ writes:



All th
is talk about precision matching and ambient light,

spectral response, etc., seems crazy. If you really must use

a photographic system (without film on a drum) why take

a lesson from some age-old aeronautical techniqes. VOR



Dear Tom,



       Was anyone talking about photographic techniques? We were considering 

the precautions / choices necessary to get optical detection methods to work 

OK for very small movements. How would your method cope with movements from 1 

sec of arc down to maybe 1/100 sec of arc? I would be very interested to read 

your calculations.



       Regards,



       Chris Chapman