Results 51 to 60 of about 917 (184)
Remote Sensing, 2022 This paper introduces a fast backprojection synthetic aperture radar (SAR) imaging algorithm based on wavenumber-domain spectral splicing. The traditional fast backprojection (FBP) algorithm establishes the polar coordinate system with the center of the ...
Huarui Sun +5 more
doaj +1 more source
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
The Radiometric Measurement Quantity for SAR Images
, 2013 A Synthetic Aperture Radar (SAR) system measures among other quantities the terrain radar reflectivity. After image calibration, the pixel intensities are commonly expressed in terms of radar cross sections (for point targets) or as backscatter ...
Döring, Björn, Schwerdt, Marco
core +1 more source
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 In this article, an effective clutter suppression and moving target imaging approach is proposed for the geosynchronous-low earth orbit (GEO-LEO) bistatic multichannel synthetic aperture radar (SAR) system, which is robust for the fast moving target with
Shuangxi Zhang +5 more
doaj +1 more source
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 +6 more
wiley +1 more source
Sensors, 2009 During the last decade a methodology for the reconstruction of surface relief by Synthetic Aperture Radar (SAR) measurements – SAR interferometry – has become a standard.
Alfredo Renga, Antonio Moccia
doaj +1 more source
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022 Theoretical studies have shown that the use of simultaneous mono- and bistatic synthetic aperture radar (SAR) data could be beneficial to agriculture and soil moisture monitoring.
Jean Bouchat +4 more
doaj +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 +4 more
wiley +1 more source
Non-Cooperative Bistatic SAR Clock Drift Compensation for Tomographic Acquisitions
Remote Sensing, 2017 In the last years, an important amount of research has been headed towards the measurement of above-ground forest biomass with polarimetric Synthetic Aperture Radar (SAR) tomography techniques.
Mario Azcueta, Stefano Tebaldini
doaj +1 more source
SWOT Water Surface Elevation in Herbaceous Wetlands of Florida's Everglades
Geophysical Research Letters, Volume 52, Issue 9, 16 May 2025.Abstract Observing water level variations in wetlands is important for tracking global water and carbon cycles. The Surface Water and Ocean Topography (SWOT) mission was launched to measure Earth's surface waters, but its performance in vegetated wetlands was unknown.
Solomon Kica +3 more
wiley +1 more source