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The Status of the FDR4ATMOS Project

Lichtenberg, Günter and Slijkhuis, Sander and Hamidouche, Mourad and Coldewey-Egbers, Melanie and Aberle, Bernd and Kumar, Aman and Noël, Stefan and Bramstedt, Klaus and Hilbig, Tina and Bösch, Tim and Lambert, J-C. and Van Gent, J. and Hubert, Daan and Green, Paul and de Vis, Pieter and Krijger, Matthijs and Dehn, Angelika and Brizzi, Gabriele (2021) The Status of the FDR4ATMOS Project. ATMOS 2021, 22-26. Nov 2021, Virtual.

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The Fundamental Data Record for ATMOSpheric Composition (FDR4ATMOS) project is part of the ESA Long Term Data Preservation (LTDP) programme and has two objectives: First, update the SCIAMACHY processing chain for better Ozone total column data: After the full re-processing of the SCIAMACHY mission with the updated processor versions, the validation showed that the total Ozone column drifted downward by nearly 2% over the mission lifetime. This drift is likely caused by changes in the degradation correction in the Level 1 processor, that led to subtle changes in the spectral structures. These are misinterpreted as an atmospheric signature. FDR4ATMOS updated the Level 0-1 processor accordingly and a full mission re-processing hast started. In an addition to the original plan, we also incorporated lunar data in the SCIAMACHYLevel 1b product. The instrument performed regular lunar observations buiding up a unique 10 year data set of lunar spectra from the UV to the SWIR with moderately high spectral resolution. In the project we calibrated these data. The results show an agreement within the error with other lunar data (e.g. ROLO). The second objective of the FDR4ATMOS project is to develop a cross-instrument Level 1 product for GOME-1 and SCIAMACHY for the UV, VIS and NIR spectral range, with focus on the spectral windows used for O3, SO2, NO2 total column retrieval and the determination of cloud properties. FDR4ATMOS aims to build a Fundamental Data Record (FDR) of Level 1 products, i.e. radiances and reflectances. The GOME-1 and SCIAMACHY instruments together span 17 years of spectrally highly resolved data essential for air quality, climate, ozone trend and UV radiation applications. We plan to generate harmonised data sets that allows to directly use it in long-term trend analysis, independently of the instrument. Since this was never done for highly resolved spectrometers, new methods have to be developed that e.g. take into account the different observation geometries and observation times of the instrument without impacting the spectral structures that are used for the retrieval of the atmospheric species. The resulting algorithms and the processor should also be as generic as possible to be able to easily transfer the methodology to other instruments (e.g. GOME-2 and Sentinel-5p) for a future extension of the time series. We will present the current status of the project, including results for the updated SCIAMACHY processor, the uncertainty analyses and will report the status of the data analysis for the harmonisation of data.

Item URL in elib:https://elib.dlr.de/146266/
Document Type:Conference or Workshop Item (Poster)
Title:The Status of the FDR4ATMOS Project
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Lichtenberg, GünterGuenter.Lichtenberg (at) dlr.dehttps://orcid.org/0000-0002-3335-2008
Slijkhuis, SanderSander.Slijkhuis (at) dlr.deUNSPECIFIED
Hamidouche, Mouradmourad.hamidouche (at) dlr.deUNSPECIFIED
Coldewey-Egbers, MelanieMelanie.Coldewey-Egbers (at) dlr.deUNSPECIFIED
Aberle, BerndBernd.Aberle (at) dlr.deUNSPECIFIED
Kumar, Amanaman.kumar (at) dlr.deUNSPECIFIED
Noël, StefanStefan.Noel (at) iup.physik.uni-bremen.deUNSPECIFIED
Bramstedt, KlausIUP Universität BremenUNSPECIFIED
Hilbig, TinaIUP, Universität BremenUNSPECIFIED
Bösch, TimIUP, University of BremenUNSPECIFIED
Hubert, DaanBIRA-IASB, Brüssel, BelgienUNSPECIFIED
Krijger, MatthijsEarth Space Solutions, Utrecht, The NetherlandsUNSPECIFIED
Dehn, AngelikaESA-ESRIN, Via Galileo Galilei, 00044 Frascati, ItalyUNSPECIFIED
Date:November 2021
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:atmosphere trace gases spectral imager calibration
Event Title:ATMOS 2021
Event Location:Virtual
Event Type:international Conference
Event Dates:22-26. Nov 2021
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Spectroscopic methods of the atmosphere
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Lichtenberg, Günter
Deposited On:26 Nov 2021 12:55
Last Modified:26 Nov 2021 12:55

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