Results 111 to 120 of about 199,781 (299)

Toward an optimal inversion method for synthetic aperture radar wind retrieval [PDF]

Journal of Geophysical Research: Oceans, 2002
In recent years, particular efforts have been made to derive wind fields over the oceans from synthetic aperture radar (SAR) images. In contrast with the scatterometer, the SAR has a higher spatial resolution and therefore has the potential to provide higher resolution wind information.
Portabella, M., Stoffelen, A., Johannessen, Johnny A.   +2 more
openaire   +4 more sources

Continuous Subsidence of Dallol Volcano Caused by Magmatic, Hydrothermal, and Salt Dissolution Processes: Insights From InSAR Observations

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 4, April 2025.
Abstract The Dallol volcano on the axis of the Erta Ale ridge (Afar rift) offers an ideal opportunity to study the interaction between magmatic and hydrothermal processes. Volcanic activity in Dallol has developed in an area below sea level with a salt plain.
Birhan A. Kebede, Carolina Pagli, Derek Keir, Freysteinn Sigmundsson, Alessandro La Rosa, Hua Wang, Elias Lewi, Snorri Gudbrandsson   +7 more
wiley   +1 more source

Efficient Raw Signal Generation Based on Equivalent Scatterer and Subaperture Processing for SAR with Arbitrary Motion [PDF]

, 2014
An efficient SAR raw signal generation method based on equivalent scatterer and subaperture processing is proposed in this paper. It considers the radar’s motion track, which can obtain the precise raw signal for the real SAR. First, the imaging geometry
An, D.X., Huang, X.T., Xie, H.T., Zhou, Z.M.   +3 more
core   +1 more source

High Resolution Full-Aperture ISAR Processing through Modified Doppler History Based Motion Compensation

Sensors, 2017
A high resolution inverse synthetic aperture radar (ISAR) technique is presented using modified Doppler history based motion compensation. To this purpose, a novel wideband ISAR system is developed that accommodates parametric processing over extended ...
Jung-Hwan Song, Kee-Woong Lee, Woo-Kyung Lee, Chul-Ho Jung   +3 more
doaj   +1 more source

Benefits of GNSS Local Observations Compared to Global Weather‐Based Models for InSAR Tropospheric Corrections Over Tropical Volcanoes: Case Studies of Piton De La Fournaise and Merapi

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract From repeat‐pass interferometry, tropospheric signals often prevent the detection of ground deformation signals. In recent years, tropospheric corrections derived from global weather‐based models have been implemented in several InSAR processing chains.
F. Albino, S. Gremion, V. Pinel, P. Bouygues, A. Peltier, F. Beauducel, J.‐L. Froger, Agus Budi Santoso   +7 more
wiley   +1 more source

Inferring Eruption Dynamics From Seismometer Tilt: A Case Study of Erebus and Augustine Volcanoes

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract Broadband seismometers are sensitive to tilt as a consequence of their design. We used broadband data from Erebus volcano on Ross Island, Antarctica, and Augustine volcano in Lower Cook Inlet, Alaska, to make tilt measurements associated with individual volcanic explosions and investigate the near‐terminal magmatic system configuration of each
M. S. Christoffersen, R. Grapenthin, M. Angarita, R. C. Aster, J. Chaput, P. R. Kyle   +5 more
wiley   +1 more source

Persepsi pelajar sarjana muda kejuruteraan elektrik terhadap program latihan industri, Kolej Universiti Teknologi Tun Hussein Onn [PDF]

, 2002
Kajian ini dijalankan bertujuan untuk mengetahui persepsi Pelajar Sarjana Muda Kejuruteraan Elektrik Terhadap Program Latihan Industri, KUiTTHO berdasarkan kepada 4 faktor iaitu kesesuaian penempatan program latihan industri, kesesuaian pendedahan ...
Mohamad Nur, Hanirah
core  

GLRT‐based detection of targets composed of distributed scattering centres

IET Radar, Sonar & Navigation
Attributed scattering problems have been found to be helpful in inverse synthetic aperture radar (ISAR) imaging and target recognition problems. In this model, the scattering centres are divided into two categories: localised and distributed.
Amir Mohammad Hatami, Seyyed Mohammad Karbasi, Mohammad Mahdi Nayebi   +2 more
doaj   +1 more source

Parameter selection in sparsity-driven SAR imaging [PDF]

, 2009
We consider a recently developed sparsity-driven synthetic aperture radar (SAR) imaging approach which can produce superresolution, feature-enhanced images.
Batu, Ozge, Batu, Özge, Cetin, Mujdat, Çetin, Müjdat   +3 more
core   +2 more sources

Freeze‐Up Ice Jams and Channel Hydraulics Cause Hazardous Open Water Zones Within Winter Ice Cover on the Kuskokwim and Yukon Rivers and Their Tributaries

Water Resources Research, Volume 61, Issue 4, April 2025.
Abstract Timing and completeness of freeze‐up on northern rivers impact winter travel and indicate responses to climate change. Open‐water zones (OWZs) within ice‐covered rivers are hazardous and may be increasing in extent and persistence. To better understand the distribution, variability, and mechanisms of OWZs, we selected nine reaches totaling 380
Christopher D. Arp, Dana N. Brown, Allen C. Bondurant, Karin L. Bodony, Melanie Engram, Katie V. Spellman, Sarah J. Clement, Matthew C. Scragg   +7 more
wiley   +1 more source