<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <!--Converted with LaTeX2HTML 98.1p1 release (March 2nd, 1998) originally by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds * revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan * with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --> <HTML> <HEAD> <TITLE>Processing the Data</TITLE> <META NAME="description" CONTENT="Processing the Data"> <META NAME="keywords" CONTENT="vol2"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <LINK REL="STYLESHEET" HREF="vol2.css"> <LINK REL="next" HREF="node55.html"> <LINK REL="previous" HREF="node42.html"> <LINK REL="up" HREF="node31.html"> <LINK REL="next" HREF="node51.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html2063" HREF="node51.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html2060" HREF="node31.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html2054" HREF="node49.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html2062" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="icons.gif/contents_motif.gif"></A> <BR> <B> Next:</B> <A NAME="tex2html2064" HREF="node51.html">How the Data is</A> <B> Up:</B> <A NAME="tex2html2061" HREF="node31.html">CCD Reductions</A> <B> Previous:</B> <A NAME="tex2html2055" HREF="node49.html">Combine Example</A> <BR> <BR> <!--End of Navigation Panel--> <H1><A NAME="SECTION00690000000000000000"> </A> <A NAME="processing-the-data"> </A> <BR> Processing the Data </H1> Having obtained some background, let us now start to process the input frames according to the scheme in Section <A HREF="node41.html#ccd:basic-reduction-steps">3.7</A>. As indicated in that section the reduction sequence consists, in a simplified version, of the following steps: <DL COMPACT> <DT>1. <DD>determine overscan correction and trim area; <DT>2. <DD>preparing calibration frames; <DT>3. <DD>do the corrections; <DT>4. <DD>apply the bad pixel corrections. </DL> <P> <BR><HR> <!--Table of Child-Links--> <A NAME="CHILD_LINKS"> </A> <UL> <LI><A NAME="tex2html2065" HREF="node51.html">How the Data is Processed</A> <LI><A NAME="tex2html2066" HREF="node52.html">Running <TT>REDUCE/CCD</TT></A> <UL> <LI><A NAME="tex2html2067" HREF="node53.html">Overscan correction and trimming</A> <LI><A NAME="tex2html2068" HREF="node54.html">Bias, Dark and Flat Field Correction</A> </UL></UL> <!--End of Table of Child-Links--> <BR><HR> <ADDRESS> <I>Petra Nass</I> <BR><I>1999-06-15</I> </ADDRESS> </BODY> </HTML>