Dr. Pascal Hedelt

Project Lead of the ESA Sentinel-5 Precursor Innovations: SO2 Layer Height project (S5P+I: SO2 LH) that aims at developing a novel scientific and operational SO2 layer height product for Sentinel-5p taking into account data production timeliness requirements. Developed and improved a combined PCA and Neural Network machine learning algorithm to retrieve the SO2 layer height for Sentinel-5p/TROPOMI UV data, considering data production timeliness requirements.

Development and maintenance of (operational) scientific algorithms and techniques for the near real-time retrieval of atmospheric trace gases in the Earth atmosphere based on high-resolution UV satellite data from: • EUMETSAT MetOp/GOME-2 • ESA Sentinel-5 Precursor/TROPOMI • ESA Sentinel-4 • ESA/EUMETSAT Sentinel-5 Specialized on SO2 retrieval and monitoring using Differential Optical Absorption Spectroscopy (DOAS) and Machine Learning techniques.

Bordeaux Area, France Research on infrared (IR) remote sensing of biomarker molecules in the atmosphere of Earth-like extrasolar planets. Radiative transfer calculations to study the detectability of biomarker molecules in extrasolar planet atmospheres for current and future ground- based and space-borne telescopes. Analysis and planning of NASA Cassini/UVIS measurements during Titan flybys

Dissertation title: "Radiative transfer in the exosphere of Saturn’s moon Titan" Grade: "Magna Cum Laude" (Physics) - Analysis of Cassini/UVIS measurements of H Lyman-Alpha emissions during the Titan flyby in 2005 - Development of a 3D Monte Carlo UV radiative transfer model to model the UV radiative transfer in Titan's exosphere - Retrieval of atomic hydrogen distribution in Titan's exosphere

Thesis ‘Transitspectroscopy of extrasolar planets using the transit of Venus as an example’ Degree: Diploma (1.9) Application of a Line-by-Line radiative transfer model to ground-based measurements of the Venus atmosphere during the Venus transit in front of the Sun in 2004. Retection of CO2 absorption lines and determination of CO2 isotopologues - Application of a Line-by-Line radiative transfer model to study the spectral appearance of a terrestrial extrasolar planet atmosphere and its detectability