1ABB Bomem Inc., 585 Blvd. Charest East, Québec, G1K 9H4, Canada
2Forschungszentrum Karlsruhe GmbH, Institut für Meteorologie und Klimaforschung, Postfach 3640, 76021 Karlsruhe, Germany
3Remote Sensing Technology Institute, German Aerospace Centre, Muenchner Str. 20, 82234 Wessling, Germany
4ESTEC, Kepplerlaan 1, Noordwijk, The Netherlands
Abstract. This paper gives an overview of the MIPAS Level 1B (L1B) processor whose main objective is to calibrate atmospheric measurements radiometrically, spectrally and geo-located. It presents also the results of instrument characterization done on ground and during the first years in-flight. An accurate calibration is mandatory for high quality atmospheric retrievals. MIPAS has shown very good performance and stability. The noise equivalent spectral radiance ranges from 3 to 50 nW/(cm2 sr cm−1) and is well within the requirements over nearly the whole spetral range. The systematic radiometric error is estimated to be within 1 or 2% in most situations.