Results 51 to 60 of about 761 (218)

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

Microwave‐Driven Dielectric‐Magnetic Regulation of Graphite@α‐MnO2 Toward Enhanced Electromagnetic Wave Absorption

Advanced Science, Volume 12, Issue 34, September 11, 2025.
This study presents a microwave‐activated composite integrating expanded graphite with α‐MnO2 nanowires, engineered to synergistically optimize dielectric and magnetic properties. The innovative microwave‐driven process enables rapid structural transformation, yielding ultrathin, scalable electromagnetic wave‐absorbing films.
Junyu Lu, Lei Xu, Cheng Xie, Chang Zhang, Zhaohui Han, Yiyao Ren, Renchao Che   +6 more
wiley   +1 more source

Performance Evaluation of Spaceborne Bistatic SAR Systems [PDF]

Journal of Electromagnetic Engineering and Science
In this paper, the performances of spaceborne bistatic synthetic aperture radar (SAR) systems are evaluated and compared with those of the conventional monostatic SAR system.
Suk-Jin Kim, Seong Joo Maeng, Jung-Hwan Lim, Jae Wook Lee, Taek-Kyung Lee, Woo Kyung Lee   +5 more
doaj   +1 more source

Laser Terminals on CubeSats: Developments for Telecommunications and Quantum Links

International Journal of Satellite Communications and Networking, Volume 43, Issue 3, Page 133-146, May/June 2025.
ABSTRACT Satellite‐based laser communication is an emerging technology that is finding its way from research to industry. Compared to radio frequency (RF) systems, it has a more efficient size, weight, and power budget and, furthermore, is license free.
Christian Roubal, Till Dolejsky, Benjamin Rödiger, Fabian Rein, Jorge Rosano Nonay, René Rüddenklau, Christos Papadopoulos, Christopher Schmidt, Florian Moll   +8 more
wiley   +1 more source

Multiangle Bistatic SAR Imaging and Fusion Based on BeiDou-2 Navigation Satellite System

Leida xuebao, 2015
Bistatic Synthetic Aperture Radar (BSAR) based on the Global Navigation Service System (GNSSBSAR) uses navigation satellites as radar transmitters, which are low in cost. However, GNSS-BSAR images have poor resolution and low Signal-to-Noise Ratios (SNR).
Zeng Tao, Ao Dong-yang, Hu Cheng, Zhang Tian   +3 more
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, Tamlin M. Pavelsky, Jessica V. Fayne, Brent A. Williams   +3 more
wiley   +1 more source

Cosmic Rays and the Askaryan Effect Reveal Subsurface Structure and Buried Ice on the Moon

Geophysical Research Letters, Volume 52, Issue 6, 28 March 2025.
Abstract We present the first full‐wavelength numerical simulations of the electric field generated by cosmic ray impacts into the Moon. Billions of cosmic rays fall onto the Moon every year. Ultra‐high energy cosmic ray impacts produce secondary particle cascades within the regolith and subsequent coherent, wide‐bandwidth, linearly‐polarized radio ...
E. S. Costello, R. R. Ghent, A. Romero‐Wolf, P. W. Gorham, P. G. Lucey, C. J. Tai Udovicic, P. Linton, A. Ludwig, K. McBride, C. Miki, E. Oberla, J. Rolla, A. Jung   +12 more
wiley   +1 more source

A New Age of SAR: How Can Commercial Smallsat Constellations Contribute to NASA's Surface Deformation and Change Mission?

Earth and Space Science, Volume 12, Issue 1, January 2025.
Abstract In response to the 2017 Decadal Survey, NASA conducted a five‐year study on the Surface Deformation and Change (SDC) designated observable to study potential mission concepts. As part of the SDC mission study, the Commercial Synthetic Aperture Radar (ComSAR) subgroup was tasked with evaluating the current landscape of the SAR and ...
Stacey A. Huang, Batuhan Osmanoğlu, Bernd Scheuchl, Shadi Oveisgharan, Jeanne M. Sauber, MinJeong Jo, Ala Khazendar, Ekaterina Tymofyeyeva, Betsy Wusk, Arif Albayrak   +9 more
wiley   +1 more source

Unambiguous signal reconstruction for GEO-LEO bistatic SAR with azimuth multichannel

The Journal of Engineering, 2019
Spaceborne bistatic multichannel synthetic aperture radar (MC-SAR) system employed inclined geosynchronous Earth orbit (GEO) transmitter and low-Earth-orbit (LEO) receiver can provide fine spatial resolution and a vast area of surveillance, which ...
Yuekun Wang, Zheng Lu, Mingming Xu, Yu Zhu, Zhenfang Li   +4 more
doaj   +1 more source

An ISAR target motion estimation algorithm based on a differential semblance criterion

Electronics Letters, Volume 61, Issue 1, January/December 2025.
This study presents a novel approach for improving rotational motion estimation in multistatic Inverse Synthetic Aperture Radar (ISAR) imaging through a Differential Semblance Optimization (DSO) criterion. By reducing discrepancies across images from multiple transmitter–receiver pairs, our method enables precise yaw rotation estimation and produces ...
D. P. Huxley, F. M. Watson, W. R. B. Lionheart   +2 more
wiley   +1 more source