FITS_tools.header_overlap(hdr1, hdr2, max_separation=180, overlap='union')[source] [edit on github]

Create a header containing the exact overlap region between two .fits files

Does NOT check to make sure the FITS files are in the same coordinate system!


hdr1,hdr2 : Header

Two pyfits headers to compare

max_separation : int

Maximum number of degrees between two headers to consider before flipping signs on one of them (this to deal with the longitude=0 region)

overlap : ‘union’ or ‘intersection’

Which merger to do