Christiane Schmullius
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View article: Novel Amplitude-Based Approach for Reducing Sidelobes in Persistent Scatterer Interferometry Processing Using Spatially Variant Apodization
Novel Amplitude-Based Approach for Reducing Sidelobes in Persistent Scatterer Interferometry Processing Using Spatially Variant Apodization Open
This study introduces an amplitude-based method that applies Spatially Variant Apodization (SVA) to reduce sidelobes in Synthetic Aperture Radar (SAR) data. Unlike conventional approaches, the filter is applied only to the amplitude while …
View article: Evaluating the German Ground Motion Service for Operational Dam Monitoring: A Comparison of InSAR Data with In Situ Measurements
Evaluating the German Ground Motion Service for Operational Dam Monitoring: A Comparison of InSAR Data with In Situ Measurements Open
This study evaluates the applicability of Sentinel-1 Persistent Scatterer Interferometry (PSI) data from the Ground Motion Service Germany (BBD) for monitoring dams by comparing it with terrestrial measurements at dams of the Ruhrverband i…
View article: A Comparison of Tree Segmentation Methods for Savanna Tree Extraction from TLS Point Clouds
A Comparison of Tree Segmentation Methods for Savanna Tree Extraction from TLS Point Clouds Open
Detecting trees accurately from terrestrial laser scanning (TLS) point clouds is crucial for processing terrestrial LiDAR data in individual tree analyses. Due to the heterogeneity of savanna ecosystems, our understanding of how various se…
View article: Identifying Deformation Drivers in Dam Segments Using Combined X- and C-Band PS Time Series
Identifying Deformation Drivers in Dam Segments Using Combined X- and C-Band PS Time Series Open
Dams play a vital role in securing water and electricity supplies for households and industry, and they contribute significantly to flood protection. Regular monitoring of dam deformations holds fundamental socio-economic and ecological im…
View article: Deforestation Increases Vegetation Vulnerability to Drought Across Biomes
Deforestation Increases Vegetation Vulnerability to Drought Across Biomes Open
Land use and land cover changes have altered terrestrial ecosystem carbon storage, but their impacts on ecosystem sensitivity to drought and temperature fluctuations have not been evaluated spatially over the globe. We estimate drought and…
View article: Towards Operational Dam Monitoring with PS-InSAR and Electronic Corner Reflectors
Towards Operational Dam Monitoring with PS-InSAR and Electronic Corner Reflectors Open
Dams are crucial for ensuring water and electricity supply, while also providing significant flood protection. Regular monitoring of dam deformations is of vital socio-economic and ecological significance. In Germany, dams must be construc…
View article: Mapping Peatland Distribution and Quantifying Peatland Below‐Ground Carbon Stocks in Colombia's Eastern Lowlands
Mapping Peatland Distribution and Quantifying Peatland Below‐Ground Carbon Stocks in Colombia's Eastern Lowlands Open
The extent and distribution of tropical peatlands, and their importance as a vulnerable carbon (C) store, remain poorly quantified. Although large peatland complexes in Peru, the Congo basin, and Southeast Asia have been mapped in detail, …
View article: Assessing the Feasibility of Persistent Scatterer Data for Operational Dam Monitoring in Germany: A Case Study
Assessing the Feasibility of Persistent Scatterer Data for Operational Dam Monitoring in Germany: A Case Study Open
Multi-temporal synthetic aperture radar interferometry (MT-InSAR) has evolved from a niche research technique into a powerful global monitoring tool. With the launch of nationwide and continent-wide ground motion services (GMSs), freely av…
View article: Enhancing the Prediction of Dam Deformations: A Novel Data-Driven Approach
Enhancing the Prediction of Dam Deformations: A Novel Data-Driven Approach Open
Deformation monitoring is a critical task for dam operators to guarantee safe operation. Given an increasing number of extreme weather events caused by climate change, the precise prediction of dam deformations has become increasingly impo…
View article: Quantifying Tree Structural Change in an African Savanna by Utilizing Multi-Temporal TLS Data
Quantifying Tree Structural Change in an African Savanna by Utilizing Multi-Temporal TLS Data Open
Structural changes in savanna trees vary spatially and temporally because of both biotic and abiotic drivers, as well as the complex interactions between them. Given this complexity, it is essential to monitor and quantify woody structural…
View article: Assessing data and sample complexity in unmanned aerial vehicle imagery for agricultural pattern classification
Assessing data and sample complexity in unmanned aerial vehicle imagery for agricultural pattern classification Open
This article assesses the use of high-resolution Unmanned Aerial Vehicle (UAV) data from commercial field sensors for classifying small-scale agricultural patterns in four crop types (Winter Wheat, Spring Barley, Rapeseed, and Corn) acquir…
View article: Estimating Canopy Interception Water Storage with GNSS-Transmissometry
Estimating Canopy Interception Water Storage with GNSS-Transmissometry Open
Storage of interception water in the canopy (S c ) heavily affects measurements of vegetation optical depth (VOD) from rain, dew and fog, impeding the direct retrieval of tree physiological parameters such as biomass and plant water conten…
View article: Sensitivity of joint atmospheric-terrestrial water balance simulations to soil representation: Convection-permitting coupled WRF-Hydro simulations for southern Africa
Sensitivity of joint atmospheric-terrestrial water balance simulations to soil representation: Convection-permitting coupled WRF-Hydro simulations for southern Africa Open
Regional weather and climate models play a crucial role in understanding and representing the regional water cycle, yet the accuracy of soil data significantly affects their reliability. In this study, we employ the fully coupled Weather R…
View article: Exploring a New Physical Scenario of Virtual Water Molecules in the Application of Measuring Virtual Trees Using Computational Virtual Measurement
Exploring a New Physical Scenario of Virtual Water Molecules in the Application of Measuring Virtual Trees Using Computational Virtual Measurement Open
Our previous studies discussed the potential of measuring virtual trees using computational virtual measurement (CVM). CVM is a general methodology that employs observational techniques in lieu of mathematical processing. The advantage of …
View article: Individual Tree-Scale Aboveground Biomass Estimation of Woody Vegetation in a Semi-Arid Savanna Using 3D Data
Individual Tree-Scale Aboveground Biomass Estimation of Woody Vegetation in a Semi-Arid Savanna Using 3D Data Open
Allometric equations are the most common way of assessing Aboveground biomass (AGB) but few exist for savanna ecosystems. The need for the accurate estimation of AGB has triggered an increase in the amount of research towards the 3D quanti…
View article: Observational Support for Regional Policy Implementation: Land Surface Change Under Anthropogenic and Climate Pressure in SALDi Study Sites
Observational Support for Regional Policy Implementation: Land Surface Change Under Anthropogenic and Climate Pressure in SALDi Study Sites Open
South Africa is a vast, very diverse and dynamic country experiencing rapidly changing demands for the utilization of its natural resources. At the same time, global climate change and related processes affect the land’s agricultural utili…
View article: A New Era of Earth Observation for the Environment: Spatio-Temporal Monitoring Capabilities for Land Degradation
A New Era of Earth Observation for the Environment: Spatio-Temporal Monitoring Capabilities for Land Degradation Open
Land degradation can be defined as a persistent reduction or loss of the biological and economic productivity resulting from climatic variations and human activities. To quantify relevant surface changes with Earth observation sensors requ…
View article: Land cover and management effects on ecosystem resistance to drought stress
Land cover and management effects on ecosystem resistance to drought stress Open
Drought events are projected to become more severe and frequent across many regions in the future, but their impacts will likely differ among ecosystems depending on their ability to maintain functioning during droughts, i.e., ecosystem re…
View article: Machine and deep learning methods for detection and mapping of coastal wetlands of Crozon Peninsula (Brittany, France) used metric and sub-metric spatial resolution
Machine and deep learning methods for detection and mapping of coastal wetlands of Crozon Peninsula (Brittany, France) used metric and sub-metric spatial resolution Open
International audience
View article: Land cover and management effects of ecosystem resistance to drought stress
Land cover and management effects of ecosystem resistance to drought stress Open
Additional code for the publication: Xiao et al. "Land cover and management effects of ecosystem resistance to drought stress". Earth System Dynamics.
View article: Land cover and management effects of ecosystem resistance to drought stress
Land cover and management effects of ecosystem resistance to drought stress Open
Additional code for the publication: Xiao et al. "Land cover and management effects of ecosystem resistance to drought stress". Earth System Dynamics.
View article: Relationship between Lidar-Derived Canopy Densities and the Scattering Phase Center of High-Resolution TanDEM-X Data
Relationship between Lidar-Derived Canopy Densities and the Scattering Phase Center of High-Resolution TanDEM-X Data Open
The estimation of forestry parameters is essential to understanding the three-dimensional structure of forests. In this respect, the potential of X-band synthetic aperture radar (SAR) has been recognized for years. Many studies have been c…
View article: Influence of flooding underneath the Amazon rainforest on Sentinel-1 backscatter
Influence of flooding underneath the Amazon rainforest on Sentinel-1 backscatter Open
Preprint of a paper that is submitted to the "Journal of Selected Topics in Earth Observation and Remote sensing" with the following abstract: It is widely assumed that C-Band Synthetic Aperture Radar (SAR) signal do not reach the forest f…
View article: Influence of flooding underneath the Amazon rainforest on Sentinel-1 backscatter
Influence of flooding underneath the Amazon rainforest on Sentinel-1 backscatter Open
Preprint of a paper that is submitted to the "Journal of Selected Topics in Earth Observation and Remote sensing" with the following abstract: It is widely assumed that C-Band Synthetic Aperture Radar (SAR) signal do not reach the forest f…
View article: Characterizing forest structure using LiDAR and multi-frequency SAR remote sensing
Characterizing forest structure using LiDAR and multi-frequency SAR remote sensing Open
Describing forest structure is fundamental to understanding forest ecology and calculating biomass estimations. To enable its characterization with large spatial coverage, we investigate data recorded by airborne LiDAR and three different …
View article: Land-cover and management modulation of ecosystem resistance to drought stress
Land-cover and management modulation of ecosystem resistance to drought stress Open
Drought events are projected to become more severe and frequent across many regions in the future, but their impacts will likely differ among ecosystems depending on the capability of ecosystem to maintain functioning during droughts, i.e.…