'World names for each coordinate axis
Returns
A list of names along each axis'

@property
def axis_type_names(self):

    names = list(self.wcs.cname)
    types = self.wcs.ctype
    for i in range(len(names)):
        if (len(names[i]) > 0):
            continue
        names[i] = types[i].split(u'-')[0]
    return names
