Benjamin Witschas
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View article: Wind-cloud interactions observed with Aeolus spaceborne Doppler Wind Lidar
Wind-cloud interactions observed with Aeolus spaceborne Doppler Wind Lidar Open
Model based studies have shown interactions between wind vertical profiles and cloudiness, but few observational studies corroborate them. The unique observations of Aeolus spaceborne Doppler wind lidar can contribute to fill this gap. In …
View article: Spectral performance analysis of the Fizeau interferometer on board ESA's Aeolus wind lidar satellite
Spectral performance analysis of the Fizeau interferometer on board ESA's Aeolus wind lidar satellite Open
This paper presents an extensive investigation of the signal fringe profile for the Fizeau interferometer used in the first spaceborne wind lidar Aeolus and considers the fundamental implications for the wind measurement accuracy in Aeolus…
View article: Methane Emissions from Industrial Activities: Quantification of Selected Polish and Middle East Sources by a Unique Helicopter Probe
Methane Emissions from Industrial Activities: Quantification of Selected Polish and Middle East Sources by a Unique Helicopter Probe Open
Global warming is proceeding rapidly and quick actions are required to suspend the increasing temperatures globally. Here we give an overview of a series of measurement studies, supported and funded by UNEP´s International Methane Emi…
View article: Quantifying Sulfur Dioxide Emissions from Industrial Activities by a Helicopter-borne System and TROPOMI in the Southern Arabian Peninsula
Quantifying Sulfur Dioxide Emissions from Industrial Activities by a Helicopter-borne System and TROPOMI in the Southern Arabian Peninsula Open
Sulfur dioxide (SO2) is an air pollutant that is toxic to humans and, as a precursor to sulfuric acid, has far-reaching consequences for the environment and climate. Anthropogenic emissions are responsible for two-thirds of total SO2 emiss…
View article: Spectral performance analysis of the Fizeau interferometer onboard ESA's Aeolus wind lidar satellite
Spectral performance analysis of the Fizeau interferometer onboard ESA's Aeolus wind lidar satellite Open
This paper presents an extensive investigation of the signal fringe profile for the Fizeau interferometer used in the first spaceborne wind lidar Aeolus, and considers the fundamental implications for the wind measurement accuracy in Aeolu…
View article: First Initiative in the Arabian Peninsula to Measure Methane Emissions from the Oil & Gas and Waste Sector by a Helicopter Probe
First Initiative in the Arabian Peninsula to Measure Methane Emissions from the Oil & Gas and Waste Sector by a Helicopter Probe Open
Within the framework of the Oil and Gas Methane Partnership 2.0 (OGMP 2.0), initiated by the United Nations Environment Programme (UNEP), companies in the Oil and Gas (O&G) sector have committed to monitor and to reduce their methane (…
View article: Validation of Aeolus L2B products over the tropical Atlantic using radiosondes
Validation of Aeolus L2B products over the tropical Atlantic using radiosondes Open
Since its launch by the European Space Agency in 2018, the Aeolus satellite has been using the first Doppler wind lidar in space to acquire three-dimensional atmospheric wind profiles around the globe. Especially in the tropics, these obse…
View article: Verification of different Fizeau fringe analysis algorithms based on airborne wind lidar data in support of ESA’s Aeolus mission
Verification of different Fizeau fringe analysis algorithms based on airborne wind lidar data in support of ESA’s Aeolus mission Open
The Aeolus mission by the European Space Agency was launched in August 2018 and stopped operations in April 2023. Aeolus carried the direct-detection Atmospheric LAser Doppler INstrument (ALADIN). To support the preparation of Aeolus, the …
View article: Comment on egusphere-2023-742
Comment on egusphere-2023-742 Open
Abstract. Since its launch by the European Space Agency in 2018, the Aeolus satellite has been using the first Doppler wind lidar in space to acquire three-dimensional atmospheric wind profiles around the globe. Especially in the tropics, …
View article: Validation of Aeolus L2B products over the tropical Atlantic using radiosondes
Validation of Aeolus L2B products over the tropical Atlantic using radiosondes Open
Since its launch by the European Space Agency in 2018, the Aeolus satellite has been using the first Doppler wind lidar in space to acquire three-dimensional atmospheric wind profiles around the globe. Especially in the tropics, these meas…
View article: Airborne coherent wind lidar measurements of the momentum flux profile from orographically induced gravity waves
Airborne coherent wind lidar measurements of the momentum flux profile from orographically induced gravity waves Open
In the course of the GW-LCYCLE II campaign, conducted in Jan/Feb 2016 from Kiruna, Sweden, coherent Doppler wind lidar (2 µm DWL) measurements were performed from the DLR Falcon aircraft to investigate gravity waves induced by flow across …
View article: Validation of Aeolus wind products over the tropical Atlantic using radiosondes
Validation of Aeolus wind products over the tropical Atlantic using radiosondes Open
<p>We present results from a cross-Atlantic validation of the Aeolus L2B wind product using radiosondes launched in the framework of the Joint Aeolus Tropical Atlantic Campaign (JATAC). Of the total of 20 profiles corresponding to Ae…
View article: Validation of the Aeolus wind observations in the tropics using the ALADIN Airborne Demonstrator and 2-µm Doppler wind lidar
Validation of the Aeolus wind observations in the tropics using the ALADIN Airborne Demonstrator and 2-µm Doppler wind lidar Open
The German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt, DLR) conducted four airborne campaigns for the validation of the Aeolus L2B wind product during the first three years of ESA’s wind lidar mission between 20…
View article: Reply on RC2
Reply on RC2 Open
Abstract. In the course of the GW-LCYCLE II campaign, conducted in Jan/Feb 2016 from Kiruna, Sweden, coherent Doppler wind lidar (2-µm DWL) measurements were performed from the DLR Falcon aircraft to investigate small-scale gravity waves i…
View article: Reply on RC1
Reply on RC1 Open
Abstract. In the course of the GW-LCYCLE II campaign, conducted in Jan/Feb 2016 from Kiruna, Sweden, coherent Doppler wind lidar (2-µm DWL) measurements were performed from the DLR Falcon aircraft to investigate small-scale gravity waves i…
View article: Validation of the Aeolus L2B wind product with airborne wind lidar measurements in the polar North Atlantic region and in the tropics
Validation of the Aeolus L2B wind product with airborne wind lidar measurements in the polar North Atlantic region and in the tropics Open
During the first 3 years of the European Space Agency's Aeolus mission, the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt, DLR) performed four airborne campaigns deploying two different Doppler wind lidars (DWL) on boa…
View article: Quality control and error assessment of the Aeolus L2B wind results from the Joint Aeolus Tropical Atlantic Campaign
Quality control and error assessment of the Aeolus L2B wind results from the Joint Aeolus Tropical Atlantic Campaign Open
Since the start of the European Space Agency's Aeolus mission in 2018, various studies were dedicated to the evaluation of its wind data quality and particularly to the determination of the systematic and random errors in the Rayleigh-clea…
View article: Reply on RC1
Reply on RC1 Open
Abstract. During the first 3 years of the European Space Agency's Aeolus mission, the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt, DLR) performed four airborne campaigns deploying two different Doppler wind lidars (D…
View article: Reply on RC2
Reply on RC2 Open
Abstract. During the first 3 years of the European Space Agency's Aeolus mission, the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt, DLR) performed four airborne campaigns deploying two different Doppler wind lidars …
View article: Comment on amt-2022-234
Comment on amt-2022-234 Open
Abstract. In the course of the GW-LCYCLE II campaign, conducted in Jan/Feb 2016 from Kiruna, Sweden, coherent Doppler wind lidar (2-µm DWL) measurements were performed from the DLR Falcon aircraft to investigate small-scale gravity waves i…
View article: Comment on amt-2022-233
Comment on amt-2022-233 Open
Abstract. During the first 3 years of the European Space Agency's Aeolus mission, the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt, DLR) performed four airborne campaigns deploying two different Doppler wind lidars …
View article: Comment on amt-2022-223
Comment on amt-2022-223 Open
Abstract. Since the start of the European Space Agency's Aeolus mission in 2018, various studies were dedicated to the evaluation of its wind data quality and particularly to the determination of the systematic and random errors in the Ray…
View article: Quality control and error assessment of the Aeolus L2B wind results from the Joint Aeolus Tropical Atlantic Campaign
Quality control and error assessment of the Aeolus L2B wind results from the Joint Aeolus Tropical Atlantic Campaign Open
Since the start of the European Space Agency’s Aeolus mission in 2018, various studies were dedicated to the evaluation of its wind data quality, and particularly to the determination of the systematic and random errors of the Rayleigh-cle…
View article: Validation of the Aeolus L2B wind product with airborne wind lidar measurements in the polar North Atlantic region and in the tropics
Validation of the Aeolus L2B wind product with airborne wind lidar measurements in the polar North Atlantic region and in the tropics Open
During the first three years of European Space Agency’s Aeolus mission, the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt, DLR) performed four airborne campaigns deploying two different Doppler wind lidars (DWL) on-boa…
View article: Airborne coherent wind lidar measurements of the momentum flux profile from orographically induced gravity waves
Airborne coherent wind lidar measurements of the momentum flux profile from orographically induced gravity waves Open
In the course of the GW-LCYCLE II campaign, conducted in Jan/Feb 2016 from Kiruna, Sweden, coherent Doppler wind lidar (2-µm DWL) measurements were performed from the DLR Falcon aircraft to investigate small-scale gravity waves induced by …
View article: Momentum fluxes from airborne wind measurements in three cumulus cases over land
Momentum fluxes from airborne wind measurements in three cumulus cases over land Open
Measurements of wind and momentum fluxes are not typically at the centre of field studies on (shallow) cumulus convection, but the mesoscale organization of convection is likely closely tied to patterns in wind. This study combines in situ…
View article: Spectral performance analysis of the Aeolus Fabry–Pérot and Fizeau interferometers during the first years of operation
Spectral performance analysis of the Aeolus Fabry–Pérot and Fizeau interferometers during the first years of operation Open
In August 2018, the European Space Agency (ESA) launched the first Doppler wind lidar into space, which has since then been providing continuous profiles of the horizontal line-of-sight wind component at a global scale. Aeolus data have be…
View article: Retrieval improvements for the ALADIN Airborne Demonstrator in support of the Aeolus wind product validation
Retrieval improvements for the ALADIN Airborne Demonstrator in support of the Aeolus wind product validation Open
The realization of the European Space Agency's Aeolus mission was supported by the long-standing development and field deployment of the Atmospheric LAser Doppler INstrument (ALADIN) Airborne Demonstrator (A2D) which, since the launch of t…
View article: Reply on RC2
Reply on RC2 Open
Abstract. In August 2018, the European Space Agency (ESA) launched the first Doppler wind lidar into space, which has since then been providing continuous profiles of the horizontal line-of-sight wind component at a global scale. Aeolus da…
View article: Comment on amt-2021-357
Comment on amt-2021-357 Open
Abstract. In August 2018, the European Space Agency (ESA) launched the first Doppler wind lidar into space, which has since then been providing continuous profiles of the horizontal line-of-sight wind component at a global scale. Aeolus da…