SCIAMACHY: New Algorithms for the Operational Level 0-1 Processor
Lichtenberg, Günter1; Slijkhuis, Sander1; Aberle, Bernd1; Sherbakov, Denis1; Noel, Stefan2; Bramstedt, Klaus2; Bovensmann, Heinrich2; Snel, Ralph3; Krijger, Matthijs3; van Hees, Richard3; Lerot, Christophe4; Dehn, Angelika5
1German Aerospace Centre (DLR), IMF, GERMANY; 2Institute of Environmental Physics/Remote Sensing Bremen (IUP/IFE)), GERMANY; 3Netherlands Institute for Space Research (SRON), NETHERLANDS; 4Belgian Institute for Space Aeronomy (BIRA-IASB), BELGIUM; 5ESA-ESRIN, ITALY
SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY) is a scanning nadir and limb spectrometer covering the wavelength range from 212 nm to 2386 nm in 8 channels. It is a joint project of Germany, the Netherlands and Belgium and was launched in February 2002 on the ENVISAT platform. After the platform failure in April 2012, SCIAMACHY is now in the postprocessing phase F. SCIAMACHY’s originally specified in-orbit lifetime was double the planned lifetime. SCIAMACHY was designed to measure column densities and vertical profiles of trace gas species in the mesosphere, in the stratosphere and in the troposphere (Bovensmann et al., 1999). It can detect O3 , H2 CO, SO2 , BrO, OClO, NO2 , H2 O, CO, CO2 , CH4 , N2 O , O2 , (O2 )2 and can provide information about aerosols and clouds.
The operational processing of SCIAMACHY aims to deliver continuously high quality data products to the scientific community. It is split into Level 0-1 processing (essentially providing calibrated radiances) and Level 1-2 processing providing geophysical products. In this paper we will describe the concept of the Level 0-1 processing and improvement and additions to the operational Level 0-1 processor, which include a new concept for the correction of degradation of the instrument, incorporation of new calibration data, an improved stray light correction and a better handling and monitoring of calibration data with a dedicated database. In the postoperational phase, there are currently two more updates of the processor planned to further improve and consolidate the 10 year data record of SCIAMACHY.