#!/usr/bin/env python3

import astropy.io.fits as pyfits
import sys
import os

if __name__ =="__main__":
    in_fn = sys.argv[1]
    hdu = pyfits.open(in_fn)
    hdr = hdu[0].header

    for key in ['LTV1',
                'LTV2',
                'INHERIT',
                'EXTTYPE',
                'EXTNAME',
                'CRVAL1A',
                'CRVAL2A',
                'CRPIX1A',
                'CRPIX2A',
                'CTYPE1A',
                'CTYPE2A',
                'CUNIT1A',
                'CUNIT2A',]:
        del hdr[key]
        
    hdr['AUTHOR'] = "Ralf Kotulla"
    hdr['EMAIL'] = "kotulla@wisc.edu"
    hdr['FILTER'] = "HSC-r"
    hdr['MAGZERO'] = 26.0

    
    hdu.writeto(sys.argv[2], overwrite=True)