CENTERS requires a list of approximate X,Y input positions which it reads from environment variables. Usually this list is created interactively with ICUR or IGCUR. IMPOS creates the list by reading it from a text file, thus allowing CENTERS to be used non-interactively.
The input file is free-format, with one X,Y position per line. The X and Y values should be separated by one or more spaces and be expressed in pixels. Up to a hundred positions may be included.
Input a list of positions from a file to the environment variables from which CENTERS obtains its input. The contents of an example input file containing positions for three objects might be: 103.4 67.8 231.6 134.5 246.7 89.2
FIGARO A general data reduction system