Hi, OFLN/OFLT sounds interesting also for our purposes at ALMA. I will have a look at the documentation. Is anyone working towards making this part of the FITS standard? How widely is this adopted, yet? Best, Dirk -- Dr. Dirk Petry, ALMA Regional Centre, ESO, Karl-Schwarzschild-Strasse 2, 85748 Garching, Germany, Phone: +49 89 3200-6511, Fax: -6358