Re: sample images

[Tom Droege <droege@wwa.com>]

Michael,

Sorry, I forgot to thank you for putting up the images.  You might also put
up the information below that will be needed by anyone trying to make sense
of them.

Tom 


Here are four little test images.  In all north is to the left and west is
at the top.  These were taken at 22:12 locate time in Chicago, 42N, 88W.
Just in case someone wants to identify the star fields.  ;^)  There were
thin clouds, so the sky background is quite high.  For the V images the
mean of a dark frame is -23737.  For the I images -23842.  Pixel scale is
roughly 7.7" per pixel.  The VCO rate is still not quite right.  I expect
that it accounts for several pixels of smear in the E-W direction.  

Exposure was about 100 seconds.  Vfield1 and Ifield1 are a pair through the
V and I filters, etc.. 

Looking at these images, I don't see anything left that I think is
vibration.  There is a shoulder on the images that might be due to "halo"
from the cloud cover.  Experts can comment.  I await a really clear night
to attempt a good focus and good VCO adjustment.