First detection of NH3 ( 1(0) longrightarrow 0(0) ) from a low mass cloud core On the low ammonia abundance of the (rho) Oph A core

The radiometer on-board the Odin satellite comprises four different sub-mm receivers covering the 486-581 GHz frequency range and one fixed frequency 119 GHz receiver. Two auto-correlators and one acousto-optical spectrometer serve as backends. This article gives an overview over the processing of the data delivered by these instruments and discusses calibration issues.