% @(#)rebin_mos.hlq	1.2 (ESO-DMD) 2/14/94 14:21:16
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%.COPYRIGHT  (c)  1994 European Southern Observatory
%.IDENT      rebin_mos.hlq
%.AUTHOR     SM, LSW
%.KEYWORDS   MIDAS, help files, REBIN/MOS
%.PURPOSE    On-line help file for the command: REBIN/MOS
%.VERSION    1.0  09-SEP-1993 : Creation, SM
%----------------------------------------------------------------
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SECTION./MOS
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REBIN/MOS					09-SEP-1993 SM
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REBIN/MOS in out [start,end,step] [method] [tabcoef] [tabmos] [ordy]
	rebin MOS frame to constant wavelength steps (2-dim)
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Purpose:   
	  Rebins MOS frame to constant wavelength steps (2-dim)
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Syntax:		
	  REBIN/MOS in out [start,end,step] [method] [tabcoef] [tabmos] [ordy]
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	  in = image to be rebinned
	  out = rebinned image
	  start = start value for rebinning
              Session keyword: REBSTRT
              Default value: 0
	  end = end value for rebinning
              Session keyword: REBEND
              Default value: 0
	  step = step value for rebinning
              Session keyword: REBSTP
              Default value: 0
	  method = method of interpolation between pixels for 
              rebinning (linear/quadratic)
              Session keyword: REBMTD
              Default value: linear
	  tabcoef = table with dispersion coefficients 
              Session keyword: LINFIT
              Default value: coerbr
	  tabmos = table with slitlet positions 
              Session keyword: MOS
              Default value: mos
	  ordy = order of fit along y-axis between scanned rows
              Session keyword: WLCORD(2)
              Default value: 1
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See also:
	  SEARCH/MOS, REB1D/MOS, APPLY/MOS, CALIBRATE/MOS
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Note:       
	  This command rebins a 2-D MOS spectrum to equidistant 
	  wavelength steps using the dispersion relation stored
          in tabcoef.tbl. Only the areas within the slitlets 
          stored in tabmos.tbl are rebinned. The gaps are left 
	  blank. The parameters for the result frame (REBSTRT,
          REBEND) should be chosen large enough (in wavelength 
          space) to fit in the data from all slitlets. 
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Examples:
\ex
	  REBIN/MOS object rebobj 3000,9000,3
          Takes the frame object.bdf and the dispersion coefficients stored 
          in the table defined by keyword LINFIT. Rebins the complete frame
          within the slitlet limits defined by the table given by keyword
          MOS two-dimensionally to a constant wavelength step of 3 wavelength 
          units (e.g. Angstroem) within 3000 to 9000 wavelength units (e.g. 
          Angstroem) and stores the result in rebobj.bdf. The interpolation 
          method between pixels is defined by keyword REBMTD and the order
          of interpolation along the y-axis is defined by keyword WLCORD(2).
	  REBIN/MOS obj reb ? quadratic coef mostab 2
          Takes the frame obj.bdf and the dispersion coefficients stored in 
          coef.tbl. Rebins the complete frame within the slitlet limits 
          defined by mostab.tbl two-dimensionally. The start and end value 
          as well as the wavelength step for rebinning are defined by the 
          keywords REBSTRT, REBEND, REBSTP. It takes a quadratic interpolation 
          between the pixels along the dispersion axis as well as along the 
          y-axis. The result is stored in reb.bdf.
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