Results 61 to 70 of about 4,848 (220)

Large‐Scale Topographic Changes at Erupting Volcanoes Measured by the TanDEM‐X Digital Change Map

Earth and Space Science, Volume 12, Issue 11, November 2025.
Abstract Volcanic eruptions cause large‐scale topographic changes, through the emplacement of lava flows and lava domes, the formation of craters and calderas, and thick ash and pyroclastic deposits. Here we analyze the TanDEM‐X Digital Change Map (DCM), which compares the DEM produced during 2010–2015 with satellite acquisitions collected in 2016–2022.
Rebecca Edwards, Juliet Biggs
wiley   +1 more source

Focusing Bistatic FMCW SAR Signal by Range Migration Algorithm Based on Fresnel Approximation

Sensors, 2015
Frequency modulated continuous wave (FMCW) technique has recently been employed by synthetic aperture radar (SAR) to decrease the radar cost and volume. However, the operation range is limited by the direct energy leakage from the transmitting channel to
Yake Li, Siu O’Young
doaj   +1 more source

Lava Tube System Development Defined by Multispectral Imaging and InSAR: The Case of the 2024 Eruption of Fernandina Volcano (Galápagos)

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract Lava tubes are subsurface conduits within a lava flow that feed its advance. Lava tube detection is important to understand lava flow dynamics and to mitigate geohazards. Here we use InSAR‐derived surface motion data, in combination with shortwave and thermal infrared imagery, to delineate a ∼14 km long lava tube system at Fernandina volcano ...
Alexis Hrysiewicz, Peter C. LaFemina, Andrew Bell, Federico Galetto, Silvia Vallejo, Benjamin Bernard, Eoghan P. Holohan   +6 more
wiley   +1 more source

A SIFT Algorithm for Bistatic SAR Imaging in Spaceborne Constant-offset Configuration (in English)

Leida xuebao, 2013
Focusing on the problem of the space-variance of the range cell migration term for bistatic Synthetic Aperture Radar (SAR), a Scaled Inverse Fourier Transform (SIFT) based imaging algorithm for constant-offset configuration bistatic SAR data processing ...
Chen Shi-chao, Xing Meng-dao, Zhang Shuang-xi, Bao Zheng   +3 more
doaj   +1 more source

Unveiling the First Impressions of the Wide‐Swath Altimetry SWOT Mission Over the Ganga River, India

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract The Surface Water and Ocean Topography (SWOT) mission offers novel global observations of river hydrodynamics, yet its performance across varied river morphologies remains understudied. We evaluate SWOT node and raster products over a ∼210 km stretch of the Ganga River, India, during the fast‐sampling phase, using GNSS‐based continuous ...
Pankaj R. Dhote, Ankit Agarwal, Adrien Paris, Gaurish Singhal, Praveen K. Thakur, Hind Oubanas, Daniel M. Moreira, Laetitia Gal, Vaibhav Garg, Pramod Kumar, Raghavendra P. Singh, Stephane Calmant   +11 more
wiley   +1 more source

Raw Data Simulation Under Undulating Terrain for Bistatic SAR With Arbitrary Configuration

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Raw data simulation is very important for system parameter design, performance evaluation, and route planning of bistatic synthetic aperture radar (SAR).
Wenchao Li, Lei Wang, Dan Liu, Tianfu Chen, Zhongyu Li, Junjie Wu, Haiguang Yang, Jianyu Yang   +7 more
doaj   +1 more source

Flood Mapping in a Complex Environment Using Bistatic TanDEM-X/TerraSAR-X InSAR Coherence

Remote Sensing, 2018
In this paper, we assess the flood mapping capabilities of the X-band Synthetic Aperture Radar (SAR) imagery acquired by the bistatic pair TanDEM-X/TerraSAR-X (TDX/TSX).
Chayma Chaabani, Marco Chini, Riadh Abdelfattah, Renaud Hostache, Karem Chokmani   +4 more
doaj   +1 more source

Focusing High Maneuvering Bistatic Forward-Looking SAR With Stationary Transmitter Using Extended Keystone Transform and Modified Frequency Nonlinear Chirp Scaling

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
This article presents an imaging solution for high maneuvering bistatic forward-looking SAR with stationary transmitter (STHM-BFSAR). In STHM-BFSAR configuration that the transmitter is mounted on a stationary platform in side-looking mode while the ...
Jiabao Ding, Yachao Li, Ming Li, Jiadong Wang   +3 more
doaj   +1 more source

A decreasing glacier mass balance gradient from the edge of the Upper Tarim Basin to the Karakoram during 2000-2014 [PDF]

, 2017
In contrast to the glacier mass losses observed at other locations around the world, some glaciers in the High Mountains of Asia appear to have gained mass in recent decades.
A Gardner, A Kääb, A Kääb, A Laghari, B Mukhopadhyay, B Mukhopadhyay, C White, C Xu, D Farinotti, D Karthe, E Rignot, G Zhang, J Gardelle, J Gardelle, J Hoffmann, L Cuo, L Ke, M Costantini, M Huss, M Rankl, N Holzer, N Neckel, P Srivastava, S Ali, S Farhan, S Liu, T Bolch, T Liu, T Yao, T Yasuda, TJ Janes, W Bao, WW Immerzeel, Z Ahmad, Z Zhang   +34 more
core   +1 more source

Coseismic Vertical Displacement for a Shallow Thrust Earthquake From EarthDEM Data

Geophysical Research Letters, Volume 52, Issue 18, 28 September 2025.
Abstract Coseismic vertical displacements are important observations that help improve our understanding of fault mechanisms and how earthquakes alter landscapes. It has been a challenge to quantify long‐wavelength topographic changes for thrust earthquakes using optical satellite imagery, as most recent studies focus on strike‐slip earthquakes that ...
Chunli Dai, Thomas Casteel, Jeffrey T. Freymueller, Ian M. Howat, Erik Husby   +4 more
wiley   +1 more source