XRCF source distance derived from the Project Science XSS distances page
	    as of Wed Apr 29 15:28:49 EDT 1998. See xss_distance_01.lua
            for more information.

        Optical Constants:
            Gullikson95 below 2keV
            Synchrotron 19961223 for P6 (used for all optics) above 2keV
            Multilayer coefficients for flat 065 (used for the 19961223 constants).

        Mirror Rigid Body Specs:
               HATS derived tilts and offsets, using measured
		 optic positions (previous versions used derived positions)
	       XRCF determined decenters

        Mirror deformations:
            Low order surface map data from HDOS data.
            Estimates of the 2nd and 3rd order distortions from HATS data.
            Epoxy cure shrinkage effects for 2 weeks after pumpdown.
            Distortion due to horizontal orientation in 1g.
	    modifications to cone-angle to give correct focal positions
	     as determined from XRCF measurements.
	    Additional tilts measured at XRCF, but not in 1G Model.

        Scattering:
            HDOS_970220 high frequency scattering tables

        CAP:
           rectangular struts and annulus, thick plate. ( script)

        Pre-Collimator:
           rectangular struts and annulus, thin plates. ( script)

        Post-Collimator:
           rectangular struts and annulus, thin plates. ( script)

        P6 Ghost Baffle:
           filled disk, thin plate. ( script )

        Origin:
           Front of CAP at 0mm

        Entrance aperture:
           Pre-Collimator plate 1 (script) (data)

        Quadrant Shutters:
           (script)

	XSS:
	  Currently, only the PIGS source is modelled.  Data are taken from 
	  the MSFC site as of 24 April 1998.
           (script)