% @(#)computgrid.hlq 17.1.1.1 (ESO-IPG) 01/25/02 17:18:46 \se SECTION./GRID \es\co COMPUTE/GRID 20-Aug-1985 DB \oc\su COMPUTE/GRID angle create image and table with distorted rect. and evenly spaced grid \us\pu Purpose: Create image with distorted but otherwise rectangular and evenly spaced grid plus a table with the points defining the grid. \\ The grid image is displayed and the grid table also plotted. \up\sy Syntax: COMPUTE/GRID angle \ys\pa angle = distortion angle of the grid (in degrees), defaulted to 1.E-5, which gives a slight exaggeration of the distortion typically found in PCD and ST-FOC image \ap\no Note: Size of both image (510 x 510 pixels) and table (81 rows) are fixed. For most tests it may be advisable to EXTRACT a subframe of the image. \\ In order to simulate point spread functions with a larger FWHM, the image may be FILTERed. \on\exs Examples: \ex COMPUTE/GRID 0.00002 Create image GRID.bdf with distorted grid and the table GRID.tbl with the points defining the grid. \\ Load the image GRID.bdf and plot the table GRID.tbl . \xe\sxe