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<H2><A NAME="SECTION0011104000000000000000">
MIDAS Commands</A>
</H2> 
A full description of the echelle commands is given in the Appendix
<A HREF="node455.html#app:echelle">D</A>.  We include here a brief summary for quick
reference. The echelle package is hierarchically organised from
low-level commands (level 0) to high-level commands (level 3). The
organization is a result of the following classification:

<P>
<UL>
<LI>Level 0. <BR>
Apart from the level 0 command <TT>LOAD/ECHELLE</TT>, the user will
      make seldom use of level 0 commands. All parameters of these commands
      must be provided on the command line. The user may use these commands
      to benefit from options non available from higher level commands.
<LI>Level 1. <BR>
Level 1 commands perform the individual steps of the reduction. Parameters
      may be provided on the command line (thus updating the echelle keywords) or
      will be read from the echelle keywords (set by command <TT>SET/ECHELLE</TT>).
      Level 1 command enable to check individual steps of the reduction.
<LI>Level 2. <BR>
Level 2 commands perform high level steps of the reduction. The level 2
      set of commands is self-consistent and enables to perform a complete
      reduction, with the optional use of verification lower level commands
      <TT>PLOT/ECHELLE, PLOT/IDENT, LOAD/IDENT, PLOT/RESIDUAL, LOAD/ECHELLE</TT>.
      Apart from method keywords and input/output images, no parameter value is 
      required on the command line, all keywords being updated by <TT>INIT/ECHELLE</TT> 
      and <TT>SET/ECHELLE</TT> commands.
<LI>Level 3. <BR>
The higher level 3 includes only two very general commands. The <TT>SET/CONTEXT</TT>
      initializes echelle keyword values and <TT>TUTORIAL/ECHELLE</TT> provides
      a demonstration of the package.
</UL>
<P>
<BR>
<DIV ALIGN="CENTER"><A NAME="7486">&#160;</A>
<TABLE>
<CAPTION><STRONG>Table 7.2:</STRONG>
Echelle Level-3 Commands</CAPTION>
<TR><TD>
  <DIV ALIGN="CENTER"><TABLE CELLPADDING=3 BORDER="1" ALIGN="CENTER">
<TR><TD ALIGN="LEFT">SET/CONTEXT       echelle</TD>
<TD ALIGN="LEFT">&nbsp;</TD>
</TR>
<TR><TD ALIGN="LEFT">TUTORIAL/ECHELLE</TD>
<TD ALIGN="LEFT">&nbsp;</TD>
</TR>
</TABLE></DIV>  
  <A NAME="echelle-level-3-commands">&#160;</A></TD></TR>
</TABLE>
</DIV>
<BR>

<P>
<BR>
<DIV ALIGN="CENTER"><A NAME="7501">&#160;</A>
<TABLE>
<CAPTION><STRONG>Table 7.3:</STRONG>
Echelle Level-2 Commands</CAPTION>
<TR><TD>
  <DIV ALIGN="CENTER"><TABLE CELLPADDING=3 BORDER="1" ALIGN="CENTER">
<TR><TD ALIGN="CENTER" COLSPAN=2>Echelle reduction commands</TD>
</TR>
<TR><TD ALIGN="LEFT">CALIBRATE/ECHELLE</TD>
<TD ALIGN="LEFT">[defmtd]  [wlcmtd]</TD>
</TR>
<TR><TD ALIGN="LEFT">FLAT/ECHELLE</TD>
<TD ALIGN="LEFT">[flat] [correct] [blazeff]</TD>
</TR>
<TR><TD ALIGN="LEFT">FILTER/ECHELLE</TD>
<TD ALIGN="LEFT">input   output</TD>
</TR>
<TR><TD ALIGN="LEFT">PREPARE/WINDOW</TD>
<TD ALIGN="LEFT">catalog   flatbkg   lhcuts</TD>
</TR>
<TR><TD ALIGN="LEFT">RESPONSE/ECHELLE</TD>
<TD ALIGN="LEFT">[std] [fluxtab] [response]</TD>
</TR>
<TR><TD ALIGN="LEFT">REPEAT/ECHELLE</TD>
<TD ALIGN="LEFT">[scalx,scaly] [response]</TD>
</TR>
<TR><TD ALIGN="LEFT">REDUCE/ECHELLE</TD>
<TD ALIGN="LEFT">input output [bkcor]</TD>
</TR>
<TR><TD ALIGN="LEFT">ROTATE/ECHELLE</TD>
<TD ALIGN="LEFT">catalog  root-name  [mode]</TD>
</TR>
<TR><TD ALIGN="LEFT">SELECT/BACKGROUND</TD>
<TD ALIGN="LEFT">[all]</TD>
</TR>
<TR><TD ALIGN="LEFT">SCAN/ECHELLE</TD>
<TD ALIGN="LEFT">frame    [scan-par]</TD>
</TR>
<TR><TD ALIGN="CENTER" COLSPAN=2>Session manager commands</TD>
</TR>
<TR><TD ALIGN="LEFT">HELP/ECHELLE</TD>
<TD ALIGN="LEFT">[param]</TD>
</TR>
<TR><TD ALIGN="LEFT">INIT/ECHELLE</TD>
<TD ALIGN="LEFT">[name]</TD>
</TR>
<TR><TD ALIGN="LEFT">SAVE/ECHELLE</TD>
<TD ALIGN="LEFT">name</TD>
</TR>
<TR><TD ALIGN="LEFT">SET/ECHELLE</TD>
<TD ALIGN="LEFT">par=value</TD>
</TR>
<TR><TD ALIGN="LEFT">SHOW/ECHELLE</TD>
<TD ALIGN="LEFT">&nbsp;</TD>
</TR>
</TABLE></DIV>  
  <A NAME="echelle-level-2-commands">&#160;</A></TD></TR>
</TABLE>
</DIV>
<BR>

<P>
<BR>
<DIV ALIGN="CENTER"><A NAME="7510">&#160;</A>
<TABLE>
<CAPTION><STRONG>Table 7.4:</STRONG>
Echelle Level-1 Commands</CAPTION>
<TR><TD>
  <DIV ALIGN="CENTER"><TABLE CELLPADDING=3 BORDER="1" ALIGN="CENTER">
<TR><TD ALIGN="LEFT">BACKGROUND/SMOOTH</TD>
<TD ALIGN="LEFT">input   output   [radx,rady] [niter] [visu]</TD>
</TR>
<TR><TD ALIGN="LEFT">BACKGROUND/ECHELLE</TD>
<TD ALIGN="LEFT">in out [radx,rady,step] [degree] [smooth] [method]</TD>
</TR>
<TR><TD ALIGN="LEFT">DEFINE/ECHELLE</TD>
<TD ALIGN="LEFT">[ordref] [width1,thres1,slope] [defmtd] [defpol]</TD>
</TR>
<TR><TD ALIGN="LEFT">DEFINE/HOUGH</TD>
<TD ALIGN="LEFT">[ordref] [nbord] [hwid] [hough_par] [thresh] 
[degx,degy] [hot_thres,step]</TD>
</TR>
<TR><TD ALIGN="LEFT">DEFINE/SKY</TD>
<TD ALIGN="LEFT">ima  [nsky]  [possky]  [half-width]</TD>
</TR>
<TR><TD ALIGN="LEFT">EXTRACT/ECHELLE</TD>
<TD ALIGN="LEFT">input output slit[,offset] [method]</TD>
</TR>
<TR><TD ALIGN="LEFT">EXTRACT/SKY</TD>
<TD ALIGN="LEFT">in  out  [mode]</TD>
</TR>
<TR><TD ALIGN="LEFT">LOAD/IDENTIFICATIONS</TD>
<TD ALIGN="LEFT">&nbsp;</TD>
</TR>
<TR><TD ALIGN="LEFT">MERGE/ECHELLE</TD>
<TD ALIGN="LEFT">input output [params] [method]</TD>
</TR>
<TR><TD ALIGN="LEFT">IDENTIFY/ECHELLE</TD>
<TD ALIGN="LEFT">[wlc] [lincat] [dc] [tol] [wlcloop] [wlcmtd] [guess]</TD>
</TR>
<TR><TD ALIGN="LEFT">PLOT/ECHELLE</TD>
<TD ALIGN="LEFT">frame [ord1,ord2] [printer]</TD>
</TR>
<TR><TD ALIGN="LEFT">PLOT/IDENT</TD>
<TD ALIGN="LEFT">frame [ord1,ord2] [printer]</TD>
</TR>
<TR><TD ALIGN="LEFT">PLOT/RESIDUALS</TD>
<TD ALIGN="LEFT">[ord1,ord2]</TD>
</TR>
<TR><TD ALIGN="LEFT">PLOT/SPECTRUM</TD>
<TD ALIGN="LEFT">in [start,end]</TD>
</TR>
<TR><TD ALIGN="LEFT">REBIN/ECHELLE</TD>
<TD ALIGN="LEFT">input output [sample]</TD>
</TR>
<TR><TD ALIGN="LEFT">RIPPLE/ECHELLE</TD>
<TD ALIGN="LEFT">input output [params] [method]  [option]</TD>
</TR>
<TR><TD ALIGN="LEFT">SEARCH/ECHELLE</TD>
<TD ALIGN="LEFT">input [width2,thres2]</TD>
</TR>
<TR><TD ALIGN="LEFT">SUBTRACT/BACKGR</TD>
<TD ALIGN="LEFT">input backgr  output [bkgmtd]  [bkgvisu]</TD>
</TR>
</TABLE></DIV>  
  <A NAME="echelle-level-1-commands">&#160;</A></TD></TR>
</TABLE>
</DIV>
<BR>

<P>
<BR>
<DIV ALIGN="CENTER"><A NAME="7519">&#160;</A>
<TABLE>
<CAPTION><STRONG>Table 7.5:</STRONG>
Echelle Level-0 Commands</CAPTION>
<TR><TD>
  <DIV ALIGN="CENTER"><TABLE CELLPADDING=3 BORDER="1" ALIGN="CENTER">
<TR><TD ALIGN="LEFT">AVERAGE/TABLE</TD>
<TD ALIGN="LEFT">frame table columns outcol rad (No on-line help)</TD>
</TR>
<TR><TD ALIGN="LEFT">EXTRACT/ORDER</TD>
<TD ALIGN="LEFT">in out  slit,angle,offset meth  table coeffs [ord1,ord2] (No on-line help)</TD>
</TR>
<TR><TD ALIGN="LEFT">EXTRACT/OPTIMAL</TD>
<TD ALIGN="LEFT">&nbsp;</TD>
</TR>
<TR><TD ALIGN="LEFT">HOUGH/ECHELLE</TD>
<TD ALIGN="LEFT">input [scan] [step,nbtr] [nbord] [flags] [hwid] [thres]</TD>
</TR>
<TR><TD ALIGN="LEFT">LOAD/ECHELLE</TD>
<TD ALIGN="LEFT">&nbsp;</TD>
</TR>
<TR><TD ALIGN="LEFT">PREPARE/BACKGROUND</TD>
<TD ALIGN="LEFT">input  [step] [init] [back_tab] [order_tab] [descr]</TD>
</TR>
<TR><TD ALIGN="LEFT">REGRESSION/ECHELLE</TD>
<TD ALIGN="LEFT">[defpol] [niter]  [absres]  [kappa]</TD>
</TR>
<TR><TD ALIGN="LEFT">SEARCH/ORDER</TD>
<TD ALIGN="LEFT">[ordref] [w,t,s]  [outtab]  [defmtd]</TD>
</TR>
<TR><TD ALIGN="LEFT">VERIFY/ECHELLE</TD>
<TD ALIGN="LEFT">file [type]</TD>
</TR>
</TABLE></DIV>  
  <A NAME="echelle-level-0-commands">&#160;</A></TD></TR>
</TABLE>
</DIV>
<BR>

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