aperture - generalized aperture program
aperture parameters
aperture is a generalized aperture program designed to simulate the effects on the incident ray stream of apertures in physical obstructions (such as the X-ray and thermal baffles). It can handle a wide variety of aperture shapes, and has provisions to allow alteration of the rays by the apertures. The philosophy behind aperture is that a geometrically complicated aperture may be modeled by a combination of geometrically simpler apertures. Rather than modeling each complex aperture with a separate program, if a flexible means of specifying the combinations of simple apertures were devised, a single program could model a wide range of shapes.
For more information, see the reference manual.
aperture uses an IRAF-compatible parameter interface.
The following parameters are available:
The filename of the lua program which defines the aperture.
Lua code that will be made available to the Lua definition program as the function override(). This can either by actual code, for example
aperture override='energy=1.49; shell=3'
or it may be the name of a file containing the Lua code. In the
latter, the first character should be the @ character:
aperture override=@code.lua
The name of the input ray stream. If it is the string stdin,
aperture will read from the standard input stream.
The name of the output ray stream. If it is the string stdout,
aperture will write to the standard output stream.
A Boolean variable indicating that rays that have been redirected by an assembly should be checked against that assembly first, rather than being checked against the next assembly.
The filename to output the accumulated statistics of the apertures. See OUTPUT STATISTICS for more information
Print some documentation and exit.
Print the version and exit.
The output file is an RDB table containing a column for the name of
the aperture and columns for all possible outcome of the interaction
of the ray with the aperture. The prefix n and w (for example
nblocked and wblocked) stands for the number and weight
respectively.
Copyright 2006 Smithsonian Astrophysical Observatory
This software is released under the GNU General Public License. You may find a copy at
http://www.fsf.org/copyleft/gpl.html
This documents version 1.1.0 of genphot.
Diab Jerius <djerius@cfa.harvard.edu>
Dan Nguyen
Ivan Stern
David Grumm