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% @(#)preparback.hlq 19.1 (ESO-IPG) 02/25/03 14:18:38
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%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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%.COPYRIGHT (c) 1991 European Southern Observatory
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%.AUTHOR Pascal Ballester, IPG/ESO
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%.KEYWORDS MIDAS, help files, PREPARE/BACKGROUND
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%.PURPOSE On-line help file for the command: PREPARE/BACKGROUND
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%.VERSION 1.0 29-JUL-1991 : Creation, PB
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%----------------------------------------------------------------
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PREPARE/BACKGROUND 10-AUG-1994 PB
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PREPARE/BACKGROUND [step] [init] [back_tab] [order_tab] [descr]
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low-level command; create table back.tbl
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Low level command called by BACKGR/ECHELLE. Prepare table
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of background reference positions from order fitting coefficients
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stored in table [order_tab] and descriptor [descr].
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PREPARE/BACKGROUND [step] [init] [bkgtab] [ordtab] [descr]
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step = step along X axis between background reference
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init = initialization flag to enforce the creation
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of a new table (init = INI). Default is NULL:
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a new table will be created only if the step
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or scan parameters have been modified, or if the
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background table does not exist.
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bkgtab = name of output background table. Default is
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ordtab = name of input order table. Default is order.tbl.
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descr = generic name of descriptors conataining coefficients
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of orders fitting. Default is COEFF.