Publications

The EnMAP spaceborne imaging spectroscopy mission: Initial scientific results two years after launch

Sabine Chabrillat, Saskia Foerster, Karl Segl, Alison Beamish, Maximilian Brell, Saeid Asadzadeh, Robert Milewski, Kathrin J. Ward, Arlena Brosinsky, Katrin Koch, Daniel Scheffler, Stephane Guillaso, Alexander Kokhanovsky, Sigrid Roessner, Luis Guanter, Hermann Kaufmann, Nicole Pinnel, Emiliano Carmona, Tobias Storch, Tobias Hank, Katja Berger, Mathias Wocher, Patrick Hostert, Sebastian van der Linden, Akpona Okujeni, Andreas Janz, Benjamin Jakimow, Astrid Bracher, Mariana A. Soppa, Leonardo M.A. Alvarado, Henning Buddenbaum, Birgit Heim, Uta Heiden, Jose Moreno, Cindy Ong, Niklas Bohn, Robert O. Green, Martin Bachmann, Raymond Kokaly, Martin Schodlok, Thomas H. Painter, Ferran Gascon, Fabrizia Buongiorno, Matti Mottus, Vittorio Ernesto Brando, Hannes Feilhauer, Matthias Betz, Simon Baur, Rupert Feckl, Anke Schickling, Vera Krieger, Michael Bock, Laura La Porta, Sebastian Fischer

Quantifying intra- and inter-annual dynamics of river-floodplain connectivity and wetland inundation with remote sensing and wavelet analysis

Hanwu Zheng, Doerthe Tetzlaff, Jonas Freymüller, Jana Chmieleski, Akpona Okujeni, Chris Soulsby

Multidecadal grassland fractional cover time series retrieval for Germany from the Landsat and Sentinel-2 archives

Akpona Okujeni, Katja Kowalski, Katarzyna Ewa Lewińska, Shawn Schneidereit, Patrick Hostert

Learning the variations in annual spectral-temporal metrics to enhance the transferability of regression models for land cover fraction monitoring

Vu-Dong Pham, Fabian Thiel, David Frantz, Akpona Okujeni, Franz Schug, Sebastian van der Linden

Large-scale remote sensing analysis reveals an increasing coupling of grassland vitality to atmospheric water demand.

Katja Kowalski, Cornelius Senf, Akpona Okujeni, Patrick Hostert

Land cover fraction mapping across global biomes with Landsat data, spatially generalized regression models and spectral-temporal metrics

Franz Schug, Kira A. Pfoch, Vu-Dong Pham, Sebastian van der Linden, Akpona Okujeni, David Frantz, Volker C. Radeloff

A hybrid data-driven approach to analyze the drivers of lake level dynamics

M. Somogyvári, D. Scherer, F. Bart, U. Fehrenbach, A. Okujeni, T. Krueger

Mapping forest fire severity using bi-temporal unmixing of Sentinel-2 data - Towards a quantitative understanding of fire impacts

Kira Anjana Pfoch, Dirk Pflugmacher, Akpona Okujeni, Patrick Hostert

EnMAP-Box: Imaging spectroscopy in QGIS

Benjamin Jakimow, Andreas Janz, Fabian Thiel, Akpona Okujeni, Patrick Hostert, Sebastian van der Linden

A generalized framework for drought monitoring across Central European grassland gradients with Sentinel-2 time series

Katja Kowalski, Akpona Okujeni, Patrick Hostert

Sub-pixel building area mapping based on synthetic training data and regression-based unmixing using Sentinel-1 and -2 data

Franz Schug, David Frantz, Akpona Okujeni, Patrick Hostert

Quantifying post-fire shifts in woody-vegetation cover composition in Mediterranean pine forests using Landsat time series and regression-based unmixing

Alba Viana-Soto, Akpona Okujeni, Dirk Pflugmacher, Mariano García, Inmaculada Aguado, Patrick Hostert

Quantifying drought effects in Central European grasslands through regression-based unmixing of intra-annual Sentinel-2 time series

Katja Kowalski, Akpona Okujeni, Maximilian Brell, Patrick Hostert

Use of Image Endmember Libraries for Multi-Sensor, Multi-Scale, and Multi-Site Mapping of Urban Areas

F. Canters, S. Cooper, J. Degerickx, U. Heiden, M. Jilge, A. Okujeni, F. Priem, B. Somers, S. van der Linden

National-scale mapping of building height using Sentinel-1 and Sentinel-2 time series

David Frantz, Franz Schug, Akpona Okujeni, Claudio Navacchi, Wolfgang Wagner, Sebastian van der Linden, Patrick Hostert

Multi-season unmixing of vegetation class fractions across diverse Californian ecoregions using simulated spaceborne imaging spectroscopy data

Akpona Okujeni, Clemens Jänicke, Sam Cooper, David Frantz, Patrick Hostert, Matthew Clark, Karl Segl, Sebastian van der Linden

Combining simulated hyperspectral EnMAP and Landsat time series for forest aboveground biomass mapping

Sam Cooper, Akpona Okujeni, Dirk Pflugmacher, Sebastian van der Linden, Patrick Hostert

Mapping urban-rural gradients of settlements and vegetation at national scale using Sentinel-2 spectral-temporal metrics and regression-based unmixing with synthetic training data

Franz Schug, David Frantz, Akpona Okujeni, Sebastian van der Linden, Patrick Hostert

Disentangling fractional vegetation cover: Regression-based unmixing of simulated spaceborne imaging spectroscopy data

Sam Cooper, Akpona Okujeni, Clemens Jänicke, Matthew Clark, Sebastian van der Linden, Patrick Hostert

Brightness gradient-corrected hyperspectral image mosaics for fractional vegetation cover mapping in northern California

Clemens Jänicke, Akpona Okujeni, Sam Cooper, Matthew Clark, Patrick Hostert, Sebastian van der Linden

A generalized regression-based unmixing model for mapping forest cover fractions throughout three decades of Landsat data

Cornelius Senf, Josef Laštovička, Akpona Okujeni, Marco Heurich, Sebastian van der Linden

Comparing map-based and library-based training approaches for urban land-cover fraction mapping from Sentinel-2 imagery

Frederik Priem, Akpona Okujeni, Sebastian van der Linden, Frank Canters

Mapping patterns of urban development in Ouagadougou, Burkina Faso, using machine learning regression modeling with bi-seasonal Landsat time series

Franz Schug, Akpona Okujeni, Janine Hauer, Patrick Hostert, Jonas Ø Nielsen, Sebastian van der Linden

Imaging Spectroscopy of Urban Environments

S. van der Linden, A. Okujeni, F. Canters, J. Degerickx, U. Heiden, P. Hostert, F. Priem, B. Somers, F. Thiel

Generalizing machine learning regression models using multi-site spectral libraries for mapping vegetation-impervious-soil fractions across multiple cities

Akpona Okujeni, Frank Canters, Sam D. Cooper, Jeroen Degerickx, Uta Heiden, Patrick Hostert, Frederik Priem, Dar A. Roberts, Ben Somers, Sebastian van der Linden

Characterizing 32 years of shrub cover dynamics in southern Portugal using annual Landsat composites and machine learning regression modeling

Stefan Suess, Sebastian van der Linden, Akpona Okujeni, Patrick Griffiths, Pedro J. Leitão, Marcel Schwieder, Patrick Hostert

6.07 - Remote Sensing of Urban Environments A2 - Liang, Shunlin

C. Small, A. Okujeni, S. van der Linden, B. Waske

Subpixel Mapping of Urban Areas Using EnMAP Data and Multioutput Support Vector Regression

J. Rosentreter, R. Hagensieker, A. Okujeni, R. Roscher, P. D. Wagner, B. Waske

Influence of neighbourhood information on ‘Local Climate Zone’ mapping in heterogeneous cities

Marie-Leen Verdonck, Akpona Okujeni, Sebastian van der Linden, Matthias Demuzere, Robert De Wulf, Frieke Van Coillie

Ensemble Learning From Synthetically Mixed Training Data for Quantifying Urban Land Cover With Support Vector Regression

Akpona Okujeni, Sebastian van der Linden, Stefan Suess, Patrick Hostert

A Novel Spectral Library Pruning Technique for Spectral Unmixing of Urban Land Cover

Jeroen Degerickx, Akpona Okujeni, Marian-Daniel Iordache, Martin Hermy, Sebastian van der Linden, Ben Somers

Using Class Probabilities to Map Gradual Transitions in Shrub Vegetation from Simulated EnMAP Data

Stefan Suess, Sebastian van der Linden, Akpona Okujeni, Pedro Leitão, Marcel Schwieder, Patrick Hostert

The EnMAP-Box—A Toolbox and Application Programming Interface for EnMAP Data Processing

Sebastian van der Linden, Andreas Rabe, Matthias Held, Benjamin Jakimow, Pedro Leitão, Akpona Okujeni, Marcel Schwieder, Stefan Suess, Patrick Hostert

Monitoring Natural Ecosystem and Ecological Gradients: Perspectives with EnMAP

P. Leitão, M. Schwieder, S. Suess, A. Okujeni, L. Galvão, S. van der Linden, P. Hostert

Extending the vegetation–impervious–soil model using simulated EnMAP data and machine learning

Akpona Okujeni, Sebastian van der Linden, Patrick Hostert

A Comparison of Advanced Regression Algorithms for Quantifying Urban Land Cover

Akpona Okujeni, Sebastian van der Linden, Benjamin Jakimow, Andreas Rabe, Jochem Verrelst, Patrick Hostert

Support vector regression and synthetically mixed training data for quantifying urban land cover

Akpona Okujeni, Sebastian van der Linden, Laurent Tits, Ben Somers, Patrick Hostert

Import Vector Machines for Quantitative Analysis of Hyperspectral Data

S. Suess, S. van der Linden, P. J. Leitao, A. Okujeni, B. Waske, P. Hostert

Sensing of photosynthetic activity of crops

U. Rascher, A. Damm, S. van der Linden, A. Okujeni, R. Pieruschka, A. Schickling, P. Hostert

CEFLES2: The remote sensing component to quantify photosynthetic efficiency from the leaf to the region by measuring sun-induced fluorescence in the oxygen absorption bands

U. Rascher, G. Agati, L. Alonso, S. Cecchi, S. Champagne, R. Colombo, A. Damm, F. Daumard, E. de Miguel, G. Fernandez, J. Franke, C. Gerbig, B. Gioli, J. A. Gómez, Y. Goulas, O. Gutiérrez-de-la-Cámara, K. Hamdi, P. Hostert, M. Jiménez, M. Kosvancova, D. Lognoli, M. Meroni, F. Miglietta, A. Moersch, J. Moreno, I. Moya, B. Neininger, A. Okujeni, A. Ounis, L. Palombi, V. Raimondi, A. Schickling, J. A. Sobrino, M. Stellmes, G. Toci, P. Toscano, T. Udelhoven, S. van der Linden, A. Zaldei