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Re: Gosh!

On Sat, 09 Feb 2002 21:21:08 -0600, you wrote:

>Climbing up onto SoapBox:
>
>Gosh everyone!  These chips are much better than I paid for.  The best are 
>Class 3 (1 is best), but I only paid Class 4 prices.  This means that they 
>have defects.  One should not expect flat fielding to cure real 
>defects.

>
>I think that you have to map the whole chip if you are going to do good 
>work.  Besides this dark streak that Andrew has found there is also a 
>bright streak that is easy to see.

Yes: this obvious one does correct out to some extent
with flat fielding, so I didn't mention it. The
correction is a good deal less than perfect with my
best flat field so far - it should be blanked off.

>These are small problems on the scale of things.  For this I chip we might 
>lose 40,000 out of 4,000,000 pixels.  This is only 1% of the chip, and 
>takes into account expected edge effects.  For this we get a 95% reduction 
>in price.  A bargain, I think.

Right!

Andrew Bennett, Avondale Vineyard