Ariel InfraRed Spectrometer (AIRS): performance of the full instrument engineering model

ARIEL IR Spectrometer (AIRS) is the infrared spectroscopic instrument of the ARIEL mission providing spectroscopy based on two independent channels covering the CH0 [1.95-3.90] µm and the CH1 [3.90-7.80] µm wavelength. The instrument is producing spectrum of low resolutions R>100 in CH0 and R>30 in CH1 on two independent Teledyne H1RG detectors. The Engineering Model is the first model fully representative in terms of performance of the full instrument chain, from optical to detection chain performance. The test bench and the results of the AIRS Engineering Model full instrument characterization of performance are presented in this paper covering the optical and detection chain in a representative environment of the mission.