This OTW script reads the X,Y,Ra,Dec values collected by previously run scripts and derives the image plate scale.
% psfind.sh wcs_setup.out arg1 = name of input [name,x,y,r,d] file (e.g. wcs_setup.out) A typical run in a script (like wcs1): # Derive the plate scale psfind.sh $2 > WCS1_Info.Plate_ScaleThe plate scale and the estimate mean error (in arcsec/pixel) are written to standard out. In a script these results are typically directed to an output file (as shown above)