A5023980873- Synthetic Aperture Radar (SAR) Applications and Techniques
- Cryospheric studies and observations
- Advanced SAR Imaging Techniques
- Soil Moisture and Remote Sensing
- Remote Sensing and LiDAR Applications
- Arctic and Antarctic ice dynamics
- Geophysics and Gravity Measurements
- Integrated Energy Systems Optimization
- German Security and Defense Policies
- Landslides and related hazards
- Oceanographic and Atmospheric Processes
- Remote Sensing in Agriculture
- Climate change and permafrost
- Ocean Waves and Remote Sensing
- Winter Sports Injuries and Performance
- Technology, Environment, Urban Planning
- 3D Modeling in Geospatial Applications
- Smart Grid Security and Resilience
- Meteorological Phenomena and Simulations
- Spacecraft Design and Technology
- Climate variability and models
- Geological and Geophysical Studies
- Flood Risk Assessment and Management
- Geophysical Methods and Applications
- Satellite Image Processing and Photogrammetry
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2016-2025
Massachusetts Institute of Technology
1982-2019
Radar (United States)
2017
Moscow Institute of Thermal Technology
2017
Dienstleistungszentrum Ländlicher Raum
2012
Institute for the Dynamics of Environmental Processes
1976-1982
Scripps Institution of Oceanography
1980
The primary objective of the TanDEM-X mission is generation a global, consistent, and high-resolution digital elevation model (DEM) with unprecedented global accuracy. goal achieved by exploiting interferometric capabilities two twin SAR satellites TerraSAR-X TanDEM-X, which fly in close orbit formation, acting as an X-band single-pass interferometer. Between December 2010 early 2015 all land surfaces have been acquired at least twice, difficult terrain up to seven or eight times....
A wind wave forecasting model is described, based upon the ray technique, which specifically designed for shallow water areas. The explicitly includes generation, refraction, and shoaling, while nonlinear dissipative processes (breaking bottom friction) are introduced through a suitable parametrization. forecast provided at specified time target position, in terms of directional spectrum, from one‐dimensional spectrum significant height derived. has been used to hindcast storms both...
The glaciers flowing into the Amundsen Sea Embayment, West Antarctica, have undergone acceleration and grounding line retreat over past few decades that may yield an irreversible mass loss. Using a constellation of satellites, we detect evolution ice velocity, thinning, Thwaites Glacier from 1992 to 2017. results reveal complex pattern melt, with sectors retreating at 0.8 km/year floating melting 200 m/year, while others 0.3 10 times slower. We interpret in terms buoyancy/slope-driven...
Warming of the ocean waters surrounding Greenland plays a major role in driving glacier retreat and contribution glaciers to sea level rise. The melt rate at junction with grounded ice-or grounding line-is, however, not well known. Here, we employ time series satellite radar interferometry data from German TanDEM-X mission, Italian COSMO-SkyMed constellation, Finnish ICEYE constellation document line migration basal rates Petermann Glacier, marine-based Northwest Greenland. We find that...
In this paper we present the activities performed at Microwaves and Radar Institute of German Aerospace Center (DLR) to derive global forest/non-forest classification mosaics from interferometric synthetic aperture radar (InSAR) data acquired by TanDEM-X mission. The have been collected between 2011 2016 in bistatic stripmap single polarization (HH) mode, with main goal generating a consistent, timely, highly accurate 3D representation terrain's surface (digital elevation model, DEM). set...
Abstract Denman Glacier, East Antarctica, holds an ice volume equivalent to a 1.5 m rise in global sea level. Using satellite radar interferometry from the COSMO‐SkyMed constellation, we detect 5.4 ± 0.3 km grounding line retreat between 1996 and 2017–2018. A novel reconstruction of glacier bed topography indicates that proceeds on western flank along previously unknown 5 wide, 1,800 deep trough, deepening 3,400 below On eastern flank, is stabilized by 10 wide ridge. At tidal frequencies,...
On June 21, 2010, the TanDEM-X mission was launched and opened a new era in spaceborne radar remote sensing. The first formation flying system built by extending TerraSAR-X synthetic aperture (SAR) second, TerraSAR-X-like satellite TanDEM-X. resulting large single-pass SAR interferometer features flexible baseline selection, enabling acquisition of highly accurate cross-track interferograms not impacted temporal decorrelation atmospheric disturbances. primary objective generation global...
The northern half of the Adriatic Sea is constituted by continental shelf with very shallow depths (20 m) in northernmost extremity. In particular, new-coastal region adjacent to Italian coastline forms a strip, isobaths running parallel coast and topography gently increasing towards interior basin. immediately south Po River delta—the major source fresh water input into Adriatic—important eutrophication phenomena have recently occurred summer. controversial question thus arises whether...
This paper presents for the first time a detailed study on information content of X-band single-pass interferometric spaceborne SAR data with respect to snow facies characterization. An approach classifying different Greenland Ice Sheet by exploiting TanDEM-X synthetic aperture radar acquisitions is firstly detailed. Large-scale mosaics backscatter and volume correlation factor, derived from quicklook images coherence, represent starting point applying an unsupervised classification method...
Among the several factors that may affect quality of interferometric synthetic aperture radar (SAR) products, volume decorrelation represents coherence loss contribution due to presence multiple scatterers within a single resolution cell, which results in an increase phase uncertainty. In this letter, we investigate effects on X-band TanDEM-X data. is first bistatic spaceborne SAR mission and provides unique, global, manifold data set be exploited for variety scientific commercial...
Phase unwrapping (PU) is among the most critical tasks in synthetic aperture radar (SAR) interferometry (InSAR). Due to presence of noise, interferogram usually presents phase inconsistencies, also called residues, which imply a nonunivocal solution. This work investigates PU problem from semantic segmentation perspective by exploiting convolutional neural network (CNN) models. In particular, popular deep-learning architecture, we introduce interferometric coherence as an input feature and...
Nowadays, deep learning (DL) finds application in a large number of scientific fields, among which the estimation and enhancement signals disrupted by noise different natures. In this article, we address problem interferometric parameters from synthetic aperture radar (SAR) data. particular, combine convolutional neural networks together with concept residual to define novel architecture, named Φ-Net, for joint phase coherence. Φ-Net is trained using data obtained an innovative strategy...
In this work, we face the problem of forest mapping from TanDEM-X data by means Convolutional Neural Networks (CNNs). Our study aims to highlight relevance domain-related features for extraction information interest thanks their joint nonlinear processing through CNN. particular, focus on main InSAR as backscatter, coherence, and volume decorrelation, well acquisition geometry local incidence angle. By using different state-of-the-art CNN architectures, our experiments consistently...
This paper reports recent advancements in the field of Synthetic Aperture Radar (SAR) for forest mapping by using interferometric short-time-series. In particular, we first present how capabilities Sentinel-1 satellites constellation can be exploited monthly Amazon rainforest. Indeed, evolution time coherence properly modeled as an exponential decay and retrieved parameters used, together with backscatter, input features to machine learning Random Forests classifier. Furthermore, analysis on...
The spaceborne mission TanDEM-X successfully acquired and processed a global Digital Elevation Model (DEM) from interferometric bistatic SAR data at X band. product has been delivered in 2016 is characterized by an unprecedented vertical accuracy. It provided 12 m, 30 90 m sampling can be accessed the scientific community via standard announcement of opportunity process submission proposal. version freely available for purposes. DEM unedited, which means that it pure result processing...
The bistatic interferometric coherence is affected by different sources of error, among which volume decorrelation, quantifies the amount noise caused scattering mechanisms. This represents a key quantity not only for performance assessment synthetic aperture radar (SAR) products, but also large variety scientific applications, ranging from land cover classification to physical parameters estimation, such as ice structure, forest height, and biomass retrieval. magnitude decorrelation can be...