http://github.com/syntelos/cc-fits-grok Syntelos project "FITS GROK". Basic FITS file dump, main.c Demonstrates the fixed length format: 80 Byte HDU References Definition of the Flexible Image Transport System (FITS), Hanish, 1995, N/OST 100-1.1, NSSSDC http://github.com/syntelos/pdf-celestial/fits/fits_standard.pdf A User's Guide for the Flexible Image Transport System (FITS), 1997, NASA FITS Support Office, GSFC http://github.com/syntelos/pdf-celestial/fits/users_guide.pdf