KOSMA

The Kölner Observatorium für SubMillimeter Astronomie (KOSMA) was a 3-m radio telescope for submillimeter astronomy located at 3,135 m on Gornergrat near Zermatt (Switzerland). It was operated by the
"I. Physikalisches Institut" (Cologne, Germany) and the "Radioastronomisches Institut der Universität Bonn" (RAIUB), University of Bonn. It was equipped with heterodyne receivers covering frequencies between 210 and 880 GHz, corresponding to wavelengths between 0.35 and 1.4 mm, for observations of lines from the interstellar medium.