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CO2Image retrieval studies and performance analysis

Hochstaffl, Philipp and Baumgartner, Andreas and Slijkhuis, Sander and Lichtenberg, Günter and Köhler, Claas Henning and Schreier, Franz and Roiger, Anke-Elisabeth and Feist, Dietrich and Marshall, Julia and Butz, André and Trautmann, Thomas (2023) CO2Image retrieval studies and performance analysis. EGU General Assembly 2023, 2023-04-23 - 2023-04-28, Vienna, Austria. doi: 10.5194/egusphere-egu23-15635.

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Official URL: https://meetingorganizer.copernicus.org/EGU23/EGU23-15635.html?pdf


Current and planned satellite missions such as the Japanese GOSAT (Greenhouse Gases Observing Satellite) and NASA's OCO (Orbiting Carbon Observatory) series and the upcoming Copernicus Carbon Dioxide Monitoring (CO2M) mission aim to constrain national and regional-scale emissions down to scales of urban agglomerations and large point sources. The CO2Image demonstrator mission of the German Aerospace Center (DLR) is specifically designed to detect and quantify carbon dioxide (CO2) and methane (CH4) emissions from medium-size point sources. To this end its COSIS (Carbon dioxide Sensing Imaging Spectrometer) push-broom grating spectrometer measures reflected solar radiation with a high spatial resolution of 50x50 m2, covering tiles of ~50x50 km2 extent. The instrument has a moderate spectral resolution of approximately ~1 nm and observes in a single spectral window in the 2 µm region. Here we present and discuss the impact of the expected COSIS performance on the retrieved level-2 data. The level-1 data (spectra) are generated using the Py4CAtS (Python for Computational ATmospheric Spectroscopy) line-by-line radiative transfer model and the COSIS SIMulator (COSIS-SIM). Based on the COSIS instrument parameters the analysis examines the retrieval errors related to noise which allows to estimate the detection and quantification limit of CO2 and CH4 emission rates at the instrument's spatial and spectral resolution. We further discuss the effect of heterogeneous scenes, i.e. high contrast surfaces that cause an effective distortion of the spectral response function by non-uniform illumination of the entrance slit. Finally, we assess the influence of initial guess values for the plume's vertical extent and shape on the retrieval.

Item URL in elib:https://elib.dlr.de/194943/
Document Type:Conference or Workshop Item (Speech, Poster)
Title:CO2Image retrieval studies and performance analysis
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Hochstaffl, PhilippUNSPECIFIEDhttps://orcid.org/0000-0001-9537-3050UNSPECIFIED
Baumgartner, AndreasUNSPECIFIEDhttps://orcid.org/0000-0002-8495-5407134908114
Lichtenberg, GünterUNSPECIFIEDhttps://orcid.org/0000-0002-3335-2008UNSPECIFIED
Köhler, Claas HenningUNSPECIFIEDhttps://orcid.org/0000-0003-0127-935XUNSPECIFIED
Schreier, FranzUNSPECIFIEDhttps://orcid.org/0000-0001-7196-6599UNSPECIFIED
Feist, DietrichDLR, IPAhttps://orcid.org/0000-0002-5890-6687UNSPECIFIED
Marshall, JuliaDLR, IPAhttps://orcid.org/0000-0003-2648-128XUNSPECIFIED
Butz, AndréUniv. Heidelberghttps://orcid.org/0000-0003-0593-1608UNSPECIFIED
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:carbon dioxide, methane, anthopogenic emissions, short-wave infrared, radiative transfer, inversion
Event Title:EGU General Assembly 2023
Event Location:Vienna, Austria
Event Type:international Conference
Event Start Date:23 April 2023
Event End Date:28 April 2023
Organizer:European Geosciences Union
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 - Project CO2-Emission monitoring, CO2Mon, R - Spectroscopic methods of the atmosphere
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Remote Sensing Technology Institute > Experimental Methods
Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Hochstaffl, Dr. Philipp
Deposited On:11 May 2023 11:40
Last Modified:24 Apr 2024 20:55

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