Results 21 to 30 of about 18,275 (269)

Dual-Frequency Airborne SAR for Large Scale Mapping of Tidal Flats

Remote Sensing, 2020
Digital elevation models of tidal flats are a most valuable data source for the water management of coastal areas and need frequent updates to account for changes in sedimentation, erosion and identification of damages in building infrastructure.
Muriel Pinheiro, Joel Amao-Oliva, Rolf Scheiber, Marc Jaeger, Ralf Horn, Martin Keller, Jens Fischer, Andreas Reigber   +7 more
doaj   +1 more source

Retrieval of Firn Thickness by Means of Polarisation Phase Differences in L-Band SAR Data

Remote Sensing, 2021
The knowledge of glacier zones’ extent and their temporal variations is fundamental for the retrieval of surface mass balance of glaciers and ice sheets.
Giuseppe Parrella, Irena Hajnsek, Konstantinos P. Papathanassiou   +2 more
doaj   +1 more source

Mitigation of Mutual Antenna Coupling Effects for Active Radar Targets in L-Band

Remote Sensing, 2021
In order to realize a compact L-band transponder design for the calibration of spaceborne synthetic aperture radar (SAR) systems, a novel antenna was developed by DLR.
Anna Maria Büchner, Klaus Weidenhaupt, Bernd Gabler, Markus Limbach, Marco Schwerdt   +4 more
doaj   +1 more source

Performance Comparison of Reflector- and Planar-Antenna Based Digital Beam-Forming SAR

International Journal of Antennas and Propagation, 2009
The trend in the conception of future spaceborne radar remote sensing is clearly toward the use of digital beamforming techniques. These systems will comprise multiple digital channels, where the analog-to-digital converter is moved closer to the antenna.
Marwan Younis, Sigurd Huber, Anton Patyuchenko, Federica Bordoni, Gerhard Krieger   +4 more
doaj   +1 more source

SAW RFID Tag Spatial Division Multiple Access Based on 3D Reflector Response Localization Using a Wideband Holographic Approach

IEEE Journal of Microwaves, 2022
Surface acoustic wave (SAW) radio-frequency identification (RFID) has high potential for industrial applications, where automated identification and localization of assets represent the backbone of process controlling and logistics.
Pau Caldero, Matthias Gareis, Martin Vossiek   +2 more
doaj   +1 more source

Hierarchical Bayesian Data Analysis in Radiometric SAR System Calibration: A Case Study on Transponder Calibration with RADARSAT-2 Data

Remote Sensing, 2013
A synthetic aperture radar (SAR) system requires external absolute calibration so that radiometric measurements can be exploited in numerous scientific and commercial applications.
Björn J. Döring, Kersten Schmidt, Matthias Jirousek, Daniel Rudolf, Jens Reimann, Sebastian Raab, John Walter Antony, Marco Schwerdt   +7 more
doaj   +1 more source

Multi-Temporal Sentinel-1 Backscatter and Coherence for Rainforest Mapping

Remote Sensing, 2020
This paper reports recent advancements in the field of Synthetic Aperture Radar (SAR) for forest mapping by using interferometric short-time-series.
Andrea Pulella, Rodrigo Aragão Santos, Francescopaolo Sica, Philipp Posovszky, Paola Rizzoli   +4 more
doaj   +1 more source

Characterization of the Amazon Rainforest Backscatter at X-Band Using TanDEM-X Data

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The radiometric calibration of spaceborne SAR products plays a key role for ensuring a good performance of the whole end-to-end system and requires a precise knowledge of both the radar system and the illuminated target on ground.
Luca Dell'Amore, Jose-Luis Bueso-Bello, Patrick Klenk, Jens Reimann, Paola Rizzoli   +4 more
doaj   +1 more source

Range-Doppler Based CFAR Ship Detection with Automatic Training Data Selection

Remote Sensing, 2019
Ship detection is an essential maritime security requirement. Current state-of-the-art synthetic aperture radar (SAR) based ship detection methods employ fully focused images.
Sushil Kumar Joshi, Stefan V. Baumgartner, Andre B. C. da Silva, Gerhard Krieger   +3 more
doaj   +1 more source

Engineered extracellular vesicles enriched with the miR‐214/199a cluster enhance the efficacy of chemotherapy in ovarian cancer

Molecular Oncology, EarlyView.
Loss of the miR‐214/199a cluster is associated with recurrence in ovarian cancer. Engineered small extracellular vesicles (m214‐sEVs) elevate miR‐214‐3p/miR‐199a‐5p in tumor cells, suppress β‐catenin, TLR4, and YKT6 signaling, reprogram tumor‐derived sEV cargo, reduce chemoresistance and migration, and enhance carboplatin efficacy and survival in ...
Weida Wang, Ayesha Alvero, Yi Qin, Mingjin Wang, Alexandra Fox, Yanfeng Li, Michael Millman, Amy Kemper, Gil Mor, Xian Shuang Liu, Michael Chopp, Zheng Gang Zhang, Yi Zhang   +12 more
wiley   +1 more source