Birgit Wessel
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View article: Improved Monitoring of Subglacial Lake Activity in Greenland using CryoSat-2 swath processed data and TanDEM-X DEMs. 
Improved Monitoring of Subglacial Lake Activity in Greenland using CryoSat-2 swath processed data and TanDEM-X DEMs.  Open
Subglacial lakes form beneath ice sheets and ice caps if water is available, and if bedrock and surface topography are able to retain the water. On a regional scale, the lakes modulate the timing and rate of freshwater flow through the sub…
View article: Improved monitoring of subglacial lake activity in Greenland
Improved monitoring of subglacial lake activity in Greenland Open
Subglacial lakes form beneath ice sheets and ice caps if water is available and if bedrock and surface topography are able to retain the water. On a regional scale, the lakes modulate the timing and rate of freshwater flow through the subg…
View article: Quantifying the impact of X-band InSAR penetration bias on elevation change and mass balance estimation
Quantifying the impact of X-band InSAR penetration bias on elevation change and mass balance estimation Open
Interferometric synthetic aperture radar (InSAR) data suffer from an elevation bias due to signal penetration into the firn and ice surface, rendering the height information unusable for elevation and mass-change detection. This study esti…
View article: Earth-Observation-Based Monitoring of Forests in Germany—Recent Progress and Research Frontiers: A Review
Earth-Observation-Based Monitoring of Forests in Germany—Recent Progress and Research Frontiers: A Review Open
One-third of Germany’s land surface area is covered by forest (around 11.4 million hectares), and thus, it characterizes the landscape. The forest is a habitat for a large number of animal and plant species, a source of raw materials, impo…
View article: The New Hydrographic Hydrosheds Database Derived from the Tandem-X Dem
The New Hydrographic Hydrosheds Database Derived from the Tandem-X Dem Open
Water-related applications such as hydrology, hydrodynamics, and flood inundation modelling crucially require fundamental hydrographic knowledge and monitoring as well as the tools and data that support mapping and analysis of natural rive…
View article: Assessment of TanDEM-X DEM 2020 Data in Temperate and Boreal Forests and Their Application to Canopy Height Change
Assessment of TanDEM-X DEM 2020 Data in Temperate and Boreal Forests and Their Application to Canopy Height Change Open
Space-borne digital elevation models (DEM) are considered as important proxy for canopy surface height and its changes in forests. Interferometric TanDEM-X DEMs were assessed regarding their accuracy in forests of Germany and Estonia. The …
View article: Improved Monitoring of Subglacial Lake Activity in Greenland
Improved Monitoring of Subglacial Lake Activity in Greenland Open
Subglacial lakes form beneath ice sheets and ice caps if water is available, and if bedrock and surface topography are able to retain the water. On a regional scale, the lakes modulate the timing and rate of freshwater flow through the sub…
View article: Improved monitoring of subglacial lake activity in Greenland
Improved monitoring of subglacial lake activity in Greenland Open
<p>Subglacial lakes may form beneath ice sheets and ice caps, given the availability of water and appropriate bedrock and surface topography to capture the water. On a regional scale, these lakes can modulate the freshwater output to…
View article: TanDEM-X PolarDEM 90 m of Antarctica: generation and error characterization
TanDEM-X PolarDEM 90 m of Antarctica: generation and error characterization Open
We present the generation and validation of an updated version of the TanDEM-X digital elevation model (DEM) of Antarctica: the TanDEM-X PolarDEM 90 m of Antarctica. Improvements compared to the global TanDEM-X DEM version comprise filling…
View article: Spaceborne height models reveal above ground biomass changes in tropical landscapes
Spaceborne height models reveal above ground biomass changes in tropical landscapes Open
The area-wide estimation of aboveground biomass (AGB) and its changes as a proxy for the sequestration and emission of carbon are currently associated with high uncertainties. Here we combined interferometric synthetic aperture radar (InSA…
View article: Reply on RC2
Reply on RC2 Open
Abstract. We present the generation and validation of an updated version of the TanDEM-X digital elevation model (DEM) of Antarctica: the TanDEM-X PolarDEM 90 m of Antarctica. Improvements compared to the global TanDEM-X DEM version compri…
View article: Reply on RC1
Reply on RC1 Open
Abstract. We present the generation and validation of an updated version of the TanDEM-X digital elevation model (DEM) of Antarctica: the TanDEM-X PolarDEM 90 m of Antarctica. Improvements compared to the global TanDEM-X DEM version compri…
View article: Comment on tc-2021-19
Comment on tc-2021-19 Open
Abstract. We present the generation and validation of an updated version of the TanDEM-X digital elevation model (DEM) of Antarctica: the TanDEM-X PolarDEM 90âm of Antarctica. Improvements compared to the global TanDEM-X DEM version com…
View article: TanDEM-X PolarDEM 90 m of Antarctica: Generation and errorcharacterization
TanDEM-X PolarDEM 90 m of Antarctica: Generation and errorcharacterization Open
We present the generation and validation of an updated version of the TanDEM-X Digital Elevation Model (DEM) of Antarctica: the TanDEM-X PolarDEM 90 m of Antarctica. Improvements compared to the global TanDEM-X DEM version include filling …
View article: TanDEM-X: 10 Years of Formation Flying Bistatic SAR Interferometry
TanDEM-X: 10 Years of Formation Flying Bistatic SAR Interferometry Open
On June 21, 2010 the still unique TanDEM-X mission was launched and opened a new era in spaceborne radar remote sensing. The first formation flying radar system was built by extending the TerraSAR-X Synthetic Aperture Radar (SAR) mission b…
View article: Shaping the Global High-Resolution TanDEM-X Digital Elevation Model
Shaping the Global High-Resolution TanDEM-X Digital Elevation Model Open
The global digital elevation model (DEM) produced by the TanDEM-X (TerraSAR-X add-on for digital elevation measurements) mission is an interferometric elevation model with unprecedented quality, accuracy, and coverage. It represents an une…
View article: The TanDEM-X Change DEM: the New Temporal DEM of the TanDEM-X Mission
The TanDEM-X Change DEM: the New Temporal DEM of the TanDEM-X Mission Open
The TanDEM-X mission is acquiring a new dataset to provide a temporally independent DEM, called "TanDEM-X Change DEM". This set of acquisitions taken between 2017 and 2020 has a clear temporal separation to the TanDEM-X global DEM data whi…
View article: Potential of Forest Monitoring with Multi-Temporal TANDEM-X Height Models
Potential of Forest Monitoring with Multi-Temporal TANDEM-X Height Models Open
Multi-temporal analysis of canopy surface heights has high potential for a forest monitoring system. TanDEM-X interferometric synthetic aperture radar (InSAR) heights provide a global data source for a multi-temporal height analysis as two…
View article: Assessment of a TanDEM-X Digital Elevation Model of the Greenland Ice Sheet and its Zonation for Winter 2015/16
Assessment of a TanDEM-X Digital Elevation Model of the Greenland Ice Sheet and its Zonation for Winter 2015/16 Open
<p>The Greenland Ice Sheet (GIS) was the largest contributor to global sea level rise in the 2005 to 2016 period (Meredith et al. in press). Therefore, it is one of the biggest players influencing our climate and monitoring and under…
View article: Estimating Penetration-Related X-Band InSAR Elevation Bias: A Study over the Greenland Ice Sheet
Estimating Penetration-Related X-Band InSAR Elevation Bias: A Study over the Greenland Ice Sheet Open
Accelerating melt on the Greenland ice sheet leads to dramatic changes at a global scale. Especially in the last decades, not only the monitoring, but also the quantification of these changes has gained considerably in importance. In this …
View article: TerraSAR-X Ice/Non-Ice Mapping of the Mackenzie River Using a Convolutional Neural Network
TerraSAR-X Ice/Non-Ice Mapping of the Mackenzie River Using a Convolutional Neural Network Open
Mackenzie Rive located in Yukon and Northwest Territories is the longest river system in Canada and an important transportation link. During the ice free season it is used for shipping transportation, while during freeze up time it serves …
View article: Assessing Single-Polarization and Dual-Polarization TerraSAR-X Data for Surface Water Monitoring
Assessing Single-Polarization and Dual-Polarization TerraSAR-X Data for Surface Water Monitoring Open
Three synthetic aperture radar (SAR) data classification methodologies were used to assess the ability of single-polarization and dual-polarization TerraSAR-X (TSX) data to classify surface water, including open water, ice, and flooded veg…
View article: Accuracy assessment of the global TanDEM-X Digital Elevation Model with GPS data
Accuracy assessment of the global TanDEM-X Digital Elevation Model with GPS data Open
The primary goal of the German TanDEM-X mission is the generation of a highly accurate and global Digital Elevation Model (DEM) with global accuracies of at least 10 m absolute height error (linear 90% error). The global TanDEM-X DEM acqui…
View article: Generation and performance assessment of the global TanDEM-X digital elevation model
Generation and performance assessment of the global TanDEM-X digital elevation model Open
The primary objective of the TanDEM-X mission is the generation of a global, consistent, and high-resolution digital elevation model (DEM) with unprecedented global accuracy. The goal is achieved by exploiting the
\ninterferometric capabil…
View article: A NEW HIGH-RESOLUTION ELEVATION MODEL OF GREENLAND DERIVED FROM TANDEM-X
A NEW HIGH-RESOLUTION ELEVATION MODEL OF GREENLAND DERIVED FROM TANDEM-X Open
In this paper we present for the first time the new digital elevation model (DEM) for Greenland produced by the TanDEM-X (TerraSAR add-on for digital elevation measurement) mission. The new, full coverage DEM of Greenland has a resolution …
View article: A NEW HIGH-RESOLUTION ELEVATION MODEL OF GREENLAND DERIVED FROM TANDEM-X
A NEW HIGH-RESOLUTION ELEVATION MODEL OF GREENLAND DERIVED FROM TANDEM-X Open
In this paper we present for the first time the new digital elevation model (DEM) for Greenland produced by the TanDEM-X (TerraSAR add-on for digital elevation measurement) mission. The new, full coverage DEM of Greenland has a resolution …
View article: A Method to Estimate Long-Wave Height Errors of SRTM C-Band DEM
A Method to Estimate Long-Wave Height Errors of SRTM C-Band DEM Open
The digital elevation model (DEM) of the Shuttle Radar Topography Mission (SRTM) still has known long-wave height errors. These errors occur especially in the continent’s interior with a spatial scale of hundreds to thousands of Kilometers…