1. Institute of Bio‐ and Geosciences, IBG‐2: Plant Sciences Forschungszentrum Jülich GmbH 52428 Jülich Germany
2. Remote Sensing Laboratories, Department of Geography University of Zurich 8057 Zürich Switzerland
3. Remote Sensing of Environmental Dynamics Laboratory, Department of Earth and Environmental Science (DISAT) University of Milano‐Bicocca 20126 Milan Italy
4. INRES‐Plant Breeding University of Bonn 53115 Bonn Germany
5. Experimental Station of University of Bonn in Klein‐Altendorf 53359 Rheinbach Germany