A Fortran subroutine package called FITSIO has been written to provide a standard programming interface to easily read and write data files in FITS format. FITSIO provides a machine independent interface which insulates programmers from having to deal directly with the complicated FITS file formats. Programmers at the HEASARC are now developing a set of general utility programs using FITSIO to manipulate the contents of FITS files.
Astronomical Data Analysis Software and Systems I
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