Dr. Sabine I. Chabrillat Profile

Dr. Sabine I. Chabrillat

at GFZ-Potsdam/LUH Hannover

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Author

Publications (5)

Proceedings Article | 28 October 2022 Presentation

The German environmental hyperspectral satellite EnMAP: mission update and related science activities

Sabine Chabrillat

Proceedings Volume PC12264, PC1226401 (2022) https://doi.org/10.1117/12.2654918

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The German Research Center for Geosciences also known as GFZ-Potsdam has a long history in the definition and development of new spaceborne sensors such as for gravity and optical Earth Observation missions with GRACE, GRACE-FO, MOMS, and very recently with the launch of EnMAP on 1st April 2022. The Environmental Mapping and Analysis Program (EnMAP) is the first German spaceborne hyperspectral satellite mission. EnMAP aims at monitoring and characterizing the Earth’s environment on a global scale. Core science objectives are toward studying environmental changes, ecosystem responses to human activities, and management of natural resources. The EnMAP mission consortium is composed of the DLR Space Administration in Bonn that is responsible for the overall project management, OHB is responsible of the space segment, DLR Earth Observation Center is responsible of the ground segment, and GFZ Potsdam is responsible for the science related activities and science mission support. In particular, EnMAP is accompanied by an extensive scientific exploitation preparation program that has been run for more than a decade to support industrial and mission development, and scientific exploitation of the data by the user community. In the current EnMAP phase, this program includes mission support during the current commissioning phase and the start of the nominal phase planned toward end of October, supported by the EnMAP Science Advisory Group. In that frame, large activities in the GFZ remote sensing group are dedicated to a) hyperspectral sensor simulation, data quality and validation of EnMAP data products, b) development of methods and open softwares toolboxes such as in the QGIS EnMAP-Box for the pre-processing of radiance to reflectance, and for the retrieval of geo- and bio-physical parameters, c) user community training and workshops, development of new educational resources such as in the EnMAP online learning initiative HYPERedu, opening of a Massive Open Online Course (MOOC) on the basics of imaging spectroscopy, d) mission support and development of validation and background mission plan, and EnMAP announcement of opportunities.

SPIE Journal Paper | 1 December 2008 Open Access

GFZ German Research Centre for Geosciences

Soeren Haubrock, Sabine Chabrillat, Matthias Kuhnert, Patrick Hostert, Hermann Kaufmann

JARS, Vol. 2, Issue 01, 023552, (December 2008) https://doi.org/10.1117/12.10.1117/1.3059191

KEYWORDS: Soil science, Reflectivity, Vegetation, Data modeling, Calibration, Remote sensing, Sensors, Global system for mobile communications, Spectral resolution, Statistical modeling

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Proceedings Article | 22 October 2004 Paper

Development of land degradation spectral indices in a semi-arid Mediterranean ecosystem

Sabine Chabrillat, Hermann Kaufmann, Alicia Palacios-Orueta, Paula Escribano, Andreas Mueller

Proceedings Volume 5574, (2004) https://doi.org/10.1117/12.565252

KEYWORDS: Vegetation, Soil science, Reflectivity, Target acquisition, Iron, Carbonates, Ecosystems, Absorption, Photovoltaics, Remote sensing

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The goal of this study is to develop remote sensing desertification indicators for drylands, in particular using the capabilities of imaging spectroscopy (hyperspectral imagery) to derive soil and vegetation specific properties linked to land degradation status. The Cabo de Gata-Nijar Natural Park in SE Spain presents a still-preserved semiarid Mediterranean ecosystem that has undergone several changes in landscape patterns and vegetation cover due to human activity. Previous studies have revealed that traditional land uses, particularly grazing, favoured in the Park the transition from tall arid brush to tall grass steppe. In the past ~40 years, tall grass steppes and arid garrigues increased while crop field decreased, and tall arid brushes decreased but then recovered after the area was declared a Natural Park in 1987. Presently, major risk is observed from a potential effect of exponential tourism and agricultural growth. A monitoring program has been recently established in the Park. Several land degradation parcels presenting variable levels of soil development and biological activity were defined in summer 2003 in agricultural lands, calcareous and volcanic areas, covering the park spatial dynamics. Intensive field spectral campaigns took place in Summer 2003 and May 2004 to monitor inter-annual changes, and assess the landscape spectral variability in spatial and temporal dimension, from the dry to the green season. Up to total 1200 field spectra were acquired over ~120 targets each year in the land degradation parcels. The targets were chosen to encompass the whole range of rocks, soils, lichens, and vegetation that can be observed in the park. Simultaneously, acquisition of hyperspectral images was performed with the HyMap sensor. This paper presents preliminary results from mainly the field spectral campaigns. Identifying sources of variability in the spectra, in relation with the ecosystem dynamics, will allow the definition of spectral indicators of change that can be used directly to derive the desertification status of a land.

Proceedings Article | 14 March 2003 Paper

Research opportunities for studying land degradation with spectroscopic techniques

Sabine Chabrillat, Hermann Kaufmann, Joachim Hill, Andreas Mueller, Bruno Merz, Helmut Echtler

Proceedings Volume 4886, (2003) https://doi.org/10.1117/12.462362

KEYWORDS: Vegetation, Soil science, Spectroscopy, Data modeling, Reflectivity, Minerals, Remote sensing, Climatology, Soil contamination, Absorption

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Proceedings Article | 14 March 2003 Paper

Isograde mapping and mineral identification on the island of Naxos, Greece, using DAIS 7915 hyperspectral data

Helmut Echtler, Karl Segl, Corinna Dickerhof, Sabine Chabrillat, Hermann Kaufmann

Proceedings Volume 4886, (2003) https://doi.org/10.1117/12.462363

KEYWORDS: Minerals, Associative arrays, Vegetation, Reflectivity, Calcite, Data acquisition, Spectral models, Mica, Signal to noise ratio, Short wave infrared radiation

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