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The new MERLIN mission for atmospheric methane: Quality and Performance monitoring

Hamidouche, Mourad and Lichtenberg, Günter and Aberle, Bernd and Trautmann, Thomas (2017) The new MERLIN mission for atmospheric methane: Quality and Performance monitoring. EUMETSAT 2017 - Meteorological Satellite Conference, 2.-6.Okt. 2017, Rom, Italien.

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Abstract

After water vapor and carbon dioxide, methane is the most abundant greenhouse gas in the Earth's atmosphere. The new generation space borne Lidar mission MERLIN (Methane Remote Sensing Lidar Mission) will make very sensitive measurements of the methane distribution with unprecedented quality, i.e. 50km averaged methane columns with an accuracy of ~ 1%. MERLIN is a joint project of the German Aerospace Center, DLR, and the French National Center for Space Studies (CNES). After its launch in 2021, MERLIN will track down the methane sources and sinks on a global scale. The instrument will be mounted on a satellite platform flying at ~500 km altitude in a Sun synchronous orbit. The instrument will continuously send and receive a pair of pulses at two different wavelengths. One wavelength λon is centered on CH4 (methane) absorption line. The other pulse is a reference at λ off which is slightly shifted by a few tenths of nm. It is located where CH 4 absorption is relatively smaller but yet it is close enough to have a nearly identical interaction with the atmosphere and the reflecting surface. From the back-scattered signals of both pulses (on and off) the DAOD (Differential Absorption Optical Depth) of methane is measured, and thus its column density. We will present our approach and strategy to perform a key ground segment work component that supports MERLIN scientific activities which is the long-term monitoring of the Lidar instrument and its measurements. This function includes tracking the behavior of the instrument and its subsystems over time as well as verification and validation of the scientific data during the entire lifetime of the mission. It mainly monitors the instrument’s performance in response to expected or unexpected natural events or technical situations. These are achieved by analyzing the measurement data and housekeeping information over different time frames. We will additionally show how our expertise in SCIAMACHY can be applied to MERLIN.

Item URL in elib:https://elib.dlr.de/116465/
Document Type:Conference or Workshop Item (Poster)
Title:The new MERLIN mission for atmospheric methane: Quality and Performance monitoring
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hamidouche, Mouradmourad.hamidouche (at) dlr.deUNSPECIFIED
Lichtenberg, GünterGuenter.Lichtenberg (at) dlr.deUNSPECIFIED
Aberle, BerndBernd.Aberle (at) dlr.deUNSPECIFIED
Trautmann, Thomasthomas.trautmann (at) dlr.deUNSPECIFIED
Date:17 March 2017
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:MERLIN, Methane, Lidar, SCIAMACHY, Remote Sensing, Atmosphere
Event Title:EUMETSAT 2017 - Meteorological Satellite Conference
Event Location:Rom, Italien
Event Type:international Conference
Event Dates:2.-6.Okt. 2017
Organizer:EUMETSAT
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung, R - Project Climatic relevance of atmospheric tracer gases, aerosols and clouds, R - Remote sensing and geoscience, R - Vorhaben LIDAR-Forschung und -Entwicklung
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Hamidouche, Mourad
Deposited On:14 Dec 2017 10:40
Last Modified:31 Jul 2019 20:13

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