Results 81 to 90 of about 1,709,476 (165)
A primer on forest structure measurement with lidar for ecologists
Ecosphere, Volume 17, Issue 8, August 2026.Abstract Light detection and ranging (lidar) technology has fundamentally advanced the way we measure forest structure, facilitating new insights into ecological processes. Lidar for forest ecology applications is deployed on multiple types of platforms that operate from the ground, air, or space, and each has associated strengths and limitations ...
K. C. Cushman +6 more
wiley +1 more source
Improving the Topside Profile of Ionosonde with TEC Retrieved from Spaceborne Polarimetric SAR
Sensors, 2019 Signals from spaceborne polarimetric synthetic aperture radar will suffer from Faraday rotations when they propagate through the ionosphere, especially those at L-band or lower frequencies, such as signals from the Phased Array type L-band Synthetic ...
Cheng Wang +5 more
doaj +1 more source
Remote Sensing During the 2025 Los Angeles Wildfires
AGU Advances, Volume 7, Issue 5, August 2026.Abstract The January 2025 Los Angeles County wildfires burned more than 50,000 acres, destroyed more than 16,000 structures, and caused 31 deaths. This Commentary examines how NASA's Disasters Program coordinated with response organizations to deliver 22 satellite and airborne products during the fires, even as the Eaton Fire forced the Jet Propulsion ...
Julie Rolla +5 more
wiley +1 more source
Remote Sensing, 2020 Oil spill detection plays an important role in marine environment protection. Quad-polarimetric Synthetic Aperture Radar (SAR) has been proved to have great potential for this task, and different SAR polarimetric features have the advantages to recognize
Jin Zhang +5 more
doaj +1 more source
Digital Beamforming Techniques for Spaceborne Radar Remote Sensing [PDF]
, 2006 This paper introduces the innovative concept of multidimensional waveform encoding for spaceborne synthetic aperture radar. The combination of this technique with digital beamforming on receive enables a new generation of SAR systems with improved ...
Moreira, Alberto +2 more
core
Earth and Space Science, Volume 13, Issue 8, August 2026.Abstract Snow on Antarctic sea ice modulates albedo, thermodynamic growth, and snow–ice formation, yet remains a leading uncertainty in altimetry‐derived sea‐ice thickness. Here we use the post‐2022 CRYO2ICE configuration to derive along‐track winter snow thickness from ICESat‐2 laser and CryoSat‐2 Ku‐band radar freeboards over the Weddell and Ross ...
Xinlong Liu +4 more
wiley +1 more source
Digital Beamforming: A Paradigm Shift for Spaceborne SAR [PDF]
, 2013 Spaceborne Synthetic Aperture Radar (SAR) provides high-resolution, day-and-night and weather-independent images for a multitude of applications ranging from geoscience and climate change research, environmental monitoring, global 2-D and 3-D mapping ...
Moreira, Alberto
core
Hot Droughts Increase the Likelihood and Impacts of Abrupt Drought‐to‐Pluvial Transitions Worldwide
Earth's Future, Volume 14, Issue 8, August 2026.Abstract Hot droughts are intensifying under anthropogenic warming, yet whether extreme heat systematically alters the triggering of abrupt drought‐to‐pluvial transitions and their downstream impacts remains poorly understood. Here, we identify global drought‐to‐pluvial abrupt transition (DPAT) events and isolate the influence of antecedent thermal ...
Yinghao Fu +6 more
wiley +1 more source
Moving ships refocusing for spaceborne SAR based on Doppler parameters estimation
The Journal of Engineering, 2019 Moving ships imaging is an important issue in marine remote-sensing by spaceborne synthetic aperture radar (SAR). As the moving ships defocus generally in high-resolution spaceborne SAR images, the refocusing step is demanded for the following processing
Yunfei Zhu, Feng He, Zhen Dong
doaj +1 more source
High Voltage, Volume 11, Issue 4, Page 1090-1101, August 2026.ABSTRACT Power lines in synthetic‐aperture radar (SAR) images are reflected as point signatures, which fluctuate annually in both the azimuth and range directions. A novel framework is proposed in this paper to evaluate the four‐dimensional dynamic status of power line sag using those point signatures in time‐series SAR images.
Sijie Ma +4 more
wiley +1 more source