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[ATM] Field Rotation and CCD Flat fielding

To: "atml" <atm@atmlist.net>
Subject: [ATM] Field Rotation and CCD Flat fielding
From: "Don Clement" <clement.focuser@verizon.net>
Date: Sun, 01 May 2005 06:57:08 -0700
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How does one apply a ccd flat field when using a field derotator? Each ccd flat field is calibrated for a specific relationship with respect to orientation of optics and detector in order to correct for vignetting, optical imperfections, etc. A field derotator changes this relationship. 

Don Clement
Running Springs, California 
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