% @(#)astrompos1.hlq	17.1.1.1 (ESO-SDAG) 01/25/02 17:13:30
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SECTION./ASTROM
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ASTROMETRY/POS1  		 		           17-Oct-1994 OH, RHW
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ASTROMETRY/POS1 
	Interactive procedure for the POS1 astrometry package
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Purpose:
	Interactive procedure for the POS1 astrometry package
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Syntax:   
	ASTROMETRY/POS1
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See also:
	ASTROMETRY/TRANSFO, ASTROMETRY/EDIT, ASTROMETRY/COMP
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Note:  
	This procedure corresponds to Richards West's original POS1 program.
	The input/output are made compatible with MIDAS, but the algorithm 
        has not been changed (as it proved to be extremely accurate, this 
        would have been masochism).
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	While the original POS1 was doing everything in one programme, the
	MIDAS version has been split in 3 steps:\\
	  1* read the measurements and standard stars, and compute the
	     transformation parameters (this step is performed by the 
	     command ASTROMETRY/TRANSFORM).\\
	  2* edit the standard star table to remove/restore some stars (this
	     step is performed by the command ASTROMETRY/EDIT)\\
	  3* actually compute the converted coordinates (this step is
	     performed by the command ASTROMETRY/COMPUTE)\\
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	Steps 1 and 2 can be iterated until a satisfactory result is obtained.
	The whole process can be performed in an iterative way; the user is 
	asked for all the parameters.\\
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Examples:
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        ASTROMETRY/POS1
        Start an interactive astrometric reduction.\\
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