David Elmore found a loose ground wire and reconnected it.
Also, a correct was done, and calibrations taken before and after.

The dark at 18_19 is not too noisy at all in q and u, and 
the electronic noise is gone.
Dark at 18_53 -- q,u still good, no noise.


I dark in asmuthal scan at diode 50 is 690 - 710 typically +-5 in noise.
Post correct, I dark scan at diode 50 is now 550 to 525, typically +-10!

However, the tscp file produced post correct is much smoother.
So the correct seems to have had a positive effect.

Best coronal image pre correct is 17:30
Best coronal image post correct is 18:56 -- it has one bug.
They both look "good".

The 18_07 tscp was used to calibrate images prior to 18_22,
the 18_41 tscp was used to calibrate images after    18_22.

The following images were copied to nahenahe to help David determine the
effect of the correct.

rcp puu.hao.ucar.edu:/puu/dppro/Data/97d267/97d267.17_30.corona.gif .
rcp puu.hao.ucar.edu:/puu/dppro/Data/97d267/97d267.18_19.dark.gif .
rcp puu.hao.ucar.edu:/puu/dppro/Data/97d267/97d267.18_53.dark.gif .
rcp puu.hao.ucar.edu:/puu/dppro/Data/97d267/97d267.18_56.corona.gif .

rcp puu.hao.ucar.edu:/puu/dppro/Data/97d267/97d267.18_07.ch0.tscp.gif .
rcp puu.hao.ucar.edu:/puu/dppro/Data/97d267/97d267.18_41.ch0.tscp.gif .

Used seeGBU2.pro, pltx.pro, "snapshot" and xv to produce the gif images.

--Alice Lecinski