new publication: Phenological Developments on Interferometric and Polarimetric Crop Signatures

new publication: Phenological Developments on Interferometric and Polarimetric Crop Signatures

August 1, 2021

Our staff member Johannes Löw published his EAGLE MSc. thesis results “The Impact of Phenological Developments on Interferometric and Polarimetric Crop Signatures Derived from Sentinel-1: Examples from the DEMMIN Study Site (Germany)” in Remote Sensing.

From the abtract: “This study explores the potential of Sentinel-1 Synthetic Aperture Radar (SAR) to identify phenological phases of wheat, sugar beet, and canola. Breakpoint and extreme value analyses were applied to a dense time series of interferometric (InSAR) and polarimetric (PolSAR) features recorded during the growing season of 2017 at the JECAM site DEMMIN (Germany). The analyses of breakpoints and extrema allowed for the distinction of vegetative and reproductive stages for wheat and canola. Certain phenological stages, measured in situ using the BBCH-scale, such as leaf development and rosette growth of sugar beet or stem elongation and ripening of wheat, were detectable by a combination of InSAR coherence, polarimetric Alpha and Entropy, and backscatter (VV/VH). Except for some fringe cases, the temporal difference between in situ observations and breakpoints or extrema ranged from zero to five days. Backscatter produced the signature that generated the most breakpoints and extrema. However, certain micro stadia, such as leaf development of BBCH 10 of sugar beet or flowering BBCH 69 of wheat, were only identifiable by the InSAR coherence and Alpha. Hence, it is concluded that combining PolSAR and InSAR features increases the number of detectable phenological events in the phenological cycles of crops.”

more details here: https://www.mdpi.com/2072-4292/13/15/2951

you may also like:

WASCAL-DE-COOP Workshop in 2022

WASCAL-DE-COOP Workshop in 2022

For the second year in a row, WASCAL graduate students from the diverse WASCAL Graduate Schools in West Africa joined the workshop “Intercultural Competence – Communications with the German Research Landscape”. This workshop was provided virtually by colleagues from...

Online course on Agricultural Land Use Mapping

Online course on Agricultural Land Use Mapping

Last week our colleague Michael Thiel gave an online course on Agricultural Land Use Mapping at WASCALs Doctoral Studies Program on Climate Change and Agriculture, which is based on the IRP/IFRA Campus in Katibougou, Mali. The course content included theories on...

most recent news:

WASCAL-DE-COOP Workshop in 2022

WASCAL-DE-COOP Workshop in 2022

For the second year in a row, WASCAL graduate students from the diverse WASCAL Graduate Schools in West Africa joined the workshop “Intercultural Competence – Communications with the German Research Landscape”. This workshop was provided virtually by colleagues from...

Online course on Agricultural Land Use Mapping

Online course on Agricultural Land Use Mapping

Last week our colleague Michael Thiel gave an online course on Agricultural Land Use Mapping at WASCALs Doctoral Studies Program on Climate Change and Agriculture, which is based on the IRP/IFRA Campus in Katibougou, Mali. The course content included theories on...