Results 41 to 50 of about 642,128 (227)

Clutter Suppression Performance Analysis of Spaceborne Bistatic Radar Systems Based on a Semiempirical Bistatic Clutter Scattering Coefficient Model

Leida xuebao
Conventional spaceborne monostatic radar systems incur huge engineering costs to achieve small moving-target detection and low anti-interference ability.
Qing LU, Zihao ZOU, Penghui HUANG, Junli CHEN, Peili XI, Yanyang LIU, Xiangcheng WAN, Shuangxi ZHANG   +7 more
doaj   +1 more source

Estimating Regional Snow Water Equivalent Using a Physics‐Informed Graph Convolution Network Model

Earth and Space Science, Volume 13, Issue 11, November 2026.
Abstract Snow water equivalent (SWE), which quantifies the amount of water in a snowpack, is critical for water supply forecasting. This study explores machine learning (ML) models' capability of representing the spatial distribution of SWE across the western United States.
Wei‐Ting Hung, Ziheng Sun, Bowen Cui, Keren Zhou, Nicoleta Cristea, Justin Pflug, Annie Burgess, Daniel Tong   +7 more
wiley   +1 more source

Bi- and Multistatic SAR: Potentials and Challenges [PDF]

, 2004
Bi- and multistatic synthetic aperture radar (SAR) operates with distinct transmit and receive antennas which are mounted on separate platforms. Such a spatial separation has several operational advantages which will increase the capability, reliability ...
Moreira, Alberto, Fiedler, Hauke, Krieger, Gerhard   +2 more
core  

A Novel Spaceborne Sliding Spotlight Range Sweep Synthetic Aperture Radar: System and Imaging

Remote Sensing, 2017
In this paper, a new Spaceborne Sliding Spotlight Range Sweep Synthetic Aperture Radar (SSS-RSSAR) is proposed to generate a high-resolution image of a Region of Interest (ROI) tilted with respect to the satellite track.
Yan Wang, Jingwen Li, Jian Yang, Bing Sun   +3 more
doaj   +1 more source

Comparison of Surface Subsidence Measured by Airborne and Satellite InSAR Over Permafrost Areas Near Yellowknife Canada

Earth and Space Science, 2021
In addition to spaceborne Interferometric Synthetic Aperture Radar (InSAR), airborne data such as those obtained by the Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) have also been utilized to measure surface subsidence in permafrost areas
Xingyu Xu, Lin Liu, Kevin Schaefer, Roger Michaelides   +3 more
doaj   +1 more source

Detection and Analysis of an Upward Jet‐Like Electrical Discharge Intercepting a High‐Altitude Research Aircraft

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract During a 2023 field campaign, a NASA ER‐2 research aircraft intercepted an upward jet‐like electrical discharge at 20 km altitude over an intense tropical thunderstorm. This event was analyzed using airborne multispectral optical sensors, electric field mills, X‐band radar, passive microwave, and ground‐based radio networks.
T. J. Lang, A. Mezentsev, M. G. Quick, C. G. Amiot, M. Bateman, R. Blakeslee, S. Cummer, G. M. Heymsfield, R. A. Kroodsma, N. G. Lehtinen, D. Mach, M. Marisaldi, M. Walker McLinden, N. Østgaard, M. Pazos, D. A. S. Sarria, C. J. Schultz, T. D. Walker, O. van der Velde, K. Virts   +19 more
wiley   +1 more source

Digital Beamforming and MIMO SAR: Review and New Concepts [PDF]

, 2012
Spaceborne Synthetic Aperture Radar (SAR) is a unique tool for large scale Earth observation, but the current generation of SAR sensors suffers from some fundamental limitations with regard to their imaging and mapping capabilities.
Villano, Michelangelo, Patyuchenko, Anton, Laskowski, Piotr, Huber, Sigurd, Bordoni, Federica, Moreira, Alberto, Younis, Marwan, Krieger, Gerhard, Kim, Junghyo, Rommel, Tobias, Lopez-Dekker, Paco   +10 more
core  

Capability of a Ground-Based Passive Surveillance System to Detect and Track Spaceborne SAR in LEO Orbits

Remote Sensing, 2022
Monitoring the Earth’s surface from the low Earth orbit (LEO) by synthetic aperture radar (SAR) provides meaningful information about a number of human activities such as the ecosystem, agriculture, and of course security matters. During its operation in
David Novák, Ladislav Gregor, Jiří Veselý   +2 more
doaj   +1 more source

BridgeSAR: Measuring Bridge‐Water Clearance From Space Using SAR Multipath Signatures

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract Bridge‐water clearance controls safe vessel passage and reflects local water‐level changes, but direct measurements are unavailable at many bridges. We present BridgeSAR, a geometry‐guided method that estimates clearance from multipath scattering stripes in synthetic aperture radar (SAR) amplitude images.
Jinwoo Kim, Zhong Lu
wiley   +1 more source

Spaceborne imaging radar-C instrument [PDF]

IEEE Transactions on Geoscience and Remote Sensing, 1989
The Shuttle Imaging Radar (SIR)-C instrument has been designed to obtain simultaneous multifrequency and simultaneous multipolarization radar images from a low Earth orbit. It is a multiparameter imaging radar that will be flown during two different seasons.
openaire   +1 more source