This is largely just like SimIm4, except I give the user the opton of which header style to use in recording the WCS in the imag header. Below is a sample command line for running SimIm5 and the header I get by using the last arguemnt set to "WCScd" to make the type of header using the CD-matrix style.

% SimIm5 N 30.0 N 1.0 WCScd 

% imhead Newwcs.fits  
# I record only wcs-related header cards   
CTYPE1  = 'RA---TAN'           /  Gnomonic Projection
CTYPE2  = 'DEC--TAN'           /  Gnomonic Projection
CRPIX1  =              100.000 / Axis 1 Reference
CRPIX2  =              100.000 / Axis 2 Reference
CRVAL1  =        180.000000000 / Ra  at Frame, J2000 (deg)
CRVAL2  =         32.500000000 / Dec at Frame, J2000 (deg)
CUNIT1  = 'DEGREES '           /  Units
CUNIT2  = 'DEGREES '           /  Units
CD1_1   = -.24056261463556E-03 / CD1_1 term
CD1_2   = -.13888889225200E-03 / CD1_2 term
CD2_1   = -.13888889225200E-03 / CD2_1 term
CD2_2   = 0.24056261463556E-03 / CD2_2 term
CRVALE  =               50.000 / Combined CRVAL error (arcsec)