AIT: Hammer-Aitoff

This equal area projection shows an entire sphere and is similar to the zenithal equal area projection, centered on the equator and rescaled to cover twice as much equatorial distance as polar distance. This projection was used for the all-sky maps produced by IRAS, the InfraRed Astronomy Satellite.

SIMPLE  =                    T / file does conform to FITS standard
BITPIX  =                  -32 / number of bits per data pixel
NAXIS   =                    2 / number of data axes
NAXIS1  =                  360 / length of data axis 1
NAXIS2  =                  180 / length of data axis 2
CTYPE1  = 'RA---AIT'
CTYPE2  = 'DEC--AIT'
CRPIX1  =                180.5  / reference pixel
CRPIX2  =                 90.5  / reference pixel
CRVAL1  =                  0.0 / reference pixel value
CRVAL2  =                  0.0 / reference pixel value
CDELT1  =                 -1.0  / degrees/pixel
CDELT2  =                  1.0  / degrees/pixel