This Ancillary Data Product archive contains the information about the HIFI beam patterns, based on observations in-flight on Mars, and an optical model representative of the Herschel telescope, including obscuration, truncation, and measured wave-front errors. The corresponding files provide the most accurate representation of the optical coupling of the HIFI detector beams to the sky.
The details on the generation of the HIFI beam pattern files is best described in the official HIFI beam release note document released in 2014 together with the corresponding files.
Further details can also be found in the PhD thesis manuscript of Dr. W. Jellema.
David Teyssier (HSC), 17-Apr-2017