Results 71 to 80 of about 55,165 (228)

Tracking Water Dynamics of a Temperate Forest Under Drought and Non‐Drought Conditions Using Active and Passive Microwave and Optical Remote Sensing

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 5, May 2026.
Abstract Water status, water dynamics, and ecohydrological resilience of a protected German beech forest during the 2018–2020 multi‐year drought are assessed using over six years of multi‐frequency remote sensing data, integrating active, passive, and optical sensors with varying canopy penetration depths, highlighting the importance of monitoring ...
Florian M. Hellwig, Anke Fluhrer, Clémence Dubois, Konstantin Schellenberg, David Chaparro, Markus Zehner, Anne Klosterhalfen, María Piles, Christiane Schmullius, Harald Kunstmann, Thomas Jagdhuber   +10 more
wiley   +1 more source

CFAR Edge Detector for Polarimetric SAR Images [PDF]

, 2003
—Finding the edges between different regions in an image is one of the fundamental steps of image analysis, and several edge detectors suitable for the special statistics of synthetic aperture radar (SAR) intensity images have previously been developed ...
Conradsen, Knut, Nielsen, Allan Aasbjerg, Schou, Jesper, Skriver, Henning   +3 more
core   +2 more sources

Multi‐Sensor Spatiotemporal Fusion for 30‐m Daily Gapless Snow Cover Mapping

Water Resources Research, Volume 62, Issue 5, May 2026.
Abstract High spatiotemporal resolution remote sensing data is crucial for monitoring heterogeneous mountainous snow cover. Although spatiotemporal fusion presents a promising approach for high‐resolution snow monitoring, cloud contamination and sparse observations remain a critical constraint on its large‐scale and long‐term implementation. To address
Jinhang Wu, Xueliang Zhang, Pengfeng Xiao, Yumeng Jia, Bo Tang, Yan Liu   +5 more
wiley   +1 more source

Resolution Equation for SAR Systems Synthesizing Circular Aperture

IEEE Access
The resolution of a synthetic aperture radar (SAR) system depends not only on the operating frequency range of a radar but also on the geometry. A radar system operating at MHz frequencies facilitates SAR resolution to the meter (m) level with a linear ...
Viet T. Vu, Yevhen Ivanenko, Vanja Lindberg, Mats I. Pettersson   +3 more
doaj   +1 more source

Analysis of Security Imaging Method for Walking Human Screening With Single Channel Synthetic Aperture Radar

IEEE Access, 2019
In this paper, a security screening imaging method for walking human with single channel synthetic aperture radar (SAR) technology is proposed. According to the theory of SAR imaging, the imaging response for each single echo of the three dimensional (3D)
Shuliang Gui, Jin Li, Feng Zuo, Yiming Pi   +3 more
doaj   +1 more source

Synthetic Aperture Radar (SAR)‐Based Evaluation of Tropical Cyclone Wind Profiles and a Theory‐Based Radius of Maximum Wind Estimation

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Accurate wind profiles and radius of maximum wind (Rmax ${R}_{\max }$) are critical for reconstructing realistic tropical cyclones (TCs) to predict extreme ocean conditions, including storm surges and waves. Leveraging the expanding Synthetic Aperture Radar (SAR) database, we conducted the first comprehensive evaluation of commonly used TC ...
Pengcheng Wang, Natacha B. Bernier, Sean Xie   +2 more
wiley   +1 more source

Synthetic-Aperture Radar Radio-Frequency Interference Suppression Based on Regularized Optimization Feature Decomposition Network

Remote Sensing
Synthetic-aperture radar (SAR) can work in all weather conditions and at all times, and satellite-borne radar has the characteristics of short revisiting period and large imaging width.
Fuping Fang, Haoliang Li, Weize Meng, Dahai Dai, Shiqi Xing   +4 more
doaj   +1 more source

Radar systems for the water resources mission, volume 1 [PDF]

The state of the art determination was made for radar measurement of: soil moisture, snow, standing and flowing water, lake and river ice, determination of required spacecraft radar parameters, study of synthetic-aperture radar systems to meet these ...
Claassen, J. P., Erickson, R. L., Fong, R. K. T., Hanson, B. C., Komen, M. J., Mcmillan, S. B., Moore, R. K., Parashar, S. K.   +7 more
core   +1 more source

Rapid Land Surface Uplift and Groundwater Recovery Observed During the Syrian War

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Recent geopolitical upheaval in Syria is driving regional growth by returning populations, which increases demands on water resources. In northwest Syria, widespread cropland abandonment during the Syrian War starting in 2011 drastically changed the hydrological regime of the region.
Saeed Mhanna, Landon J. S. Halloran, Yves Tille, Ahmed Haj Asaad, Francois Zwahlen, Philip Brunner   +5 more
wiley   +1 more source

Observations of Coherence Changes in C‐Band SAR Linked to Snow Thermodynamics and Wind Redistribution on First‐Year Sea Ice

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract We present novel observations of C‐band Synthetic Aperture Radar (SAR) coherence sensitivities and patterns for snow on first‐year sea ice (FYI) consistent with snow thermodynamics and wind redistribution. Wintertime SAR coherence and backscatter change observations of landfast FYI in Dease Strait, Nunavut, Canada are made using 12‐day repeat ...
John Yackel, Torsten Geldsetzer, Kiran Yendamuri, Vishnu Nandan, Rasmus Tonboe, Julienne Stroeve, Monojit Saha, Robbie Mallett, Hoi Ming Lam   +8 more
wiley   +1 more source