This day suffered from polarization darkness early in the day.  Especially
evident in the raw data and as usual, improved in the calibrated data.  
These images appeared slightly saturated after calibrating them with a tscp
file from 99d108.  I tried again using tscp file from 99d105 and obtained
slightly better results so I kept them.  The rings visible in the average
image appeared regardless of the tscp file I used but looked best with the
file from 99d105, so I kept those.

I believe the saturation is due to the sky brightness mentioned in the
observer's logs.

Tony