A5032791474- Synthetic Aperture Radar (SAR) Applications and Techniques
- Cryospheric studies and observations
- Remote-Sensing Image Classification
- Geophysics and Gravity Measurements
- Climate change and permafrost
- Remote Sensing and Land Use
- Soil Moisture and Remote Sensing
- 3D Modeling in Geospatial Applications
- Advanced SAR Imaging Techniques
- Arctic and Antarctic ice dynamics
- Methane Hydrates and Related Phenomena
- Land Use and Ecosystem Services
- German Security and Defense Policies
- Landslides and related hazards
- Impact of Light on Environment and Health
- Flood Risk Assessment and Management
- Satellite Image Processing and Photogrammetry
- Remote Sensing and LiDAR Applications
- Remote Sensing in Agriculture
- Technology, Environment, Urban Planning
- Geographic Information Systems Studies
- Automated Road and Building Extraction
- GNSS positioning and interference
- Disaster Management and Resilience
- Hydrology and Watershed Management Studies
Remote Sensing Solutions (Germany)
2003-2025
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2015-2024
ORCID
2021
Laboratoire de Génie Chimique
2017
Applied Radar (United States)
2013
User Systems (United States)
2010-2012
Czech Aerospace Research Centre
2005
The primary goal of the German TanDEM-X mission is generation a highly accurate and global Digital Elevation Model (DEM) with accuracies at least 10 m absolute height error (linear 90% error). DEM acquired single-pass SAR interferometry was finished in September 2016. This paper provides unique accuracy assessment final using two different GPS point reference data sets, which are distributed across all continents, to fully characterize error. Firstly, vertical examined by about three million...
The German TerraSAR-X add-on for Digital Elevation Measurement (TanDEM-X) mission (TDM) collects two global data sets of very high resolution (VHR) synthetic aperture radar (SAR) images between 2011 and 2013. Such imagery provides a unique information source the identification built-up areas in so far spatial detail. This letter presents novel implementation fully automated processing system delineation human settlements worldwide based on SAR acquired context TDM. proposed Urban Footprint...
Settlements, and in particular cities, are at the center of key future challenges related to global change sustainable development. Widely used indicators assess efficiency sustainability settlement development compactness density built-up area. However, scale, a temporally consistent spatially detailed survey distribution concentration building stock – meaning total area volume buildings within defined spatial unit or settlement, commonly referred as does not yet exist. To fill this data...
With a spatial resolution of up to 1 m, the German radar satellite TerraSAR-X (TSX) has significantly increased usability spaceborne synthetic aperture (SAR) imagery in context urban applications. This paper presents an approach toward semiautomated detection built-up areas (BAs) based on single-polarized TSX images. The proposed methodology includes specific preprocessing SAR data and automated image analysis procedure. focuses local speckle characteristics order provide texture layer that...
TerraSAR-X add-on for digital elevation measurement (TanDEM-X) is a German Earth observation mission collecting total of two global coverages very high resolution (VHR) synthetic aperture radar (SAR) X-band data with spatial around three meters in the years 2011 and 2012. With these, TanDEM-X (TDM) will provide unique set which complementary to existing based on medium (MR) or (HR) optical imagery. The capabilities TDM terms supporting analysis monitoring human settlement patterns are...
Due to spatial and temporal variability an effective monitoring system for water resources must consider the use of remote sensing provide information. Synthetic Aperture Radar (SAR) is useful due timely data acquisition sensitivity surface flooded vegetation. The ability map vegetation attributed double bounce scattering mechanism, often dominant this target. Dong Ting Lake in China ideal site evaluating SAR application annual flooding caused by mountain snow melt causing extensive changes...
In recent years, the German Remote Sensing Data Center (DFD) of Aerospace (DLR) has gained a lot experience in water surface extraction from synthetic aperture radar (SAR) data for various application domains. this context, four approaches have been developed, which jointly form so-called DFD Water Suite: The Mask Processor (WaMaPro) is based on simple and high-performance algorithm that processes multi-sensor SAR order to provide decision-makers with information about location surfaces....
The TerraSAR-X (TSX) mission provides a distinguished collection of high resolution satellite images that shows great promise for global monitoring human settlements. Hence, the German Aerospace Center (DLR) has developed Urban Footprint Processor (UFP) represents an operational framework mapping built-up areas based on mass processing and analysis TSX imagery. UFP includes functionalities data management, feature extraction, unsupervised classification, mosaicking, post-editing. Based...
Abstract. This study aims at creating a holistic conceptual approach systematizing the interrelation of (natural) hazards, vulnerability and risk. A general hierarchical risk meta-framework presents potentially affected components given system, such as its physical, demographic, social, economic, political or ecological spheres, depending on particular hazard. Based this meta-framework, measurable indicators are specified for system "urban area" an example. framework is used outline to...
This letter proposes an optimization approach that enhances the quality of image segmentation using software Definiens Developer. The procedure aims at minimization over- and undersegmentations in order to attain more accurate results. iteratively combines a sequence multiscale segmentation, feature-based classification, classification-based object refinement. developed method has been applied various remotely sensed data is compared results achieved with established procedures provided by...
The appearance of objects and surfaces in synthetic aperture radar (SAR) images significantly differs from the human perception environment. In addition, quality SAR data is degraded by speckle noise, superposing true radiometric textural information image. Hence, interpretation considered to be more challenging compared analysis optical data. However, this paper, we demonstrate how on local development can used for differentiation basic land cover (LC) types a single-polarized For that...
Urban morphology is characterized by a complex and variable coexistence of diverse, spatially spectrally heterogeneous objects. Built-up areas are among the most rapidly changing expanding elements landscape. Thus, remote sensing becomes an essential field for up-to-date area-wide data acquisition, especially in explosively sprawling cities developing countries. The urban heterogeneity requires high spatial resolution image accurate geometric differentiation small-scale physical features....
Abstract. Estimating flood risks and managing disasters combines knowledge in climatology, meteorology, hydrology, hydraulic engineering, statistics, planning geography – thus a complex multi-faceted problem. This study focuses on the capabilities of multi-source remote sensing data to support decision-making before, during after event. With our focus urbanized areas, sample methods applications show multi-scale products from hazard vulnerability perspective risk framework. From side, we...
The German SAR interferometry mission TanDEM-X performed on two TerraSAR-X satellites flying in close formation will provide a global Digital Elevation Model (DEM). A by-product is so-called the Water Indication Mask (WAM). purpose of this supplementary information layer to support DEM editing process. surfaces usually show lower coherence an interferometric data set due temporal de-correlation and low backscattering. Consequently corresponding elevation values derived from interferogram are...
Since 2010, TanDEM-X and its twin satellite TerraSAR-X fly in a close orbit formation form single-pass synthetic aperture radar (SAR) interferometer. The was established to acquire global high-precision digital elevation model (DEM) using SAR interferometry (InSAR). In order achieve the required height accuracy of DEM, at least two coverages have be acquired. However, difficult mountainous terrain, up five are present. Here, acquisitions from ascending descending orbits needed fill gaps...
Wetlands in semi-arid Africa are vital as water resource for local inhabitants and biodiversity, but they prone to strong seasonal fluctuations. Lac Bam is the largest natural freshwater lake Burkina Faso, its mixed with patches of floating or flooded vegetation, very turbid sediment-rich. These characteristics well usual cloud cover during rainy season can limit suitability optical remote sensing data monitoring purposes. This study demonstrates applicability weather-independent...
Accelerating melt on the Greenland ice sheet leads to dramatic changes at a global scale. Especially in last decades, not only monitoring, but also quantification of these has gained considerably importance. In this context, Interferometric Synthetic Aperture Radar (InSAR) systems complement existing data sources by their capability acquire 3D information high spatial resolution over large areas independent weather conditions and illumination. However, penetration SAR signals into snow...