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In the problem of spotlight mode airborne synthetic aperture radar (SAR) image formation, it is well-known that data collected over a wide azimuthal angle violate the isotropic scattering property typically assumed. Many techniques have…

图像与视频处理 · 电气工程与系统科学 2023-04-12 Victor Churchill , Anne Gelb

Inversion of gravity data is an important method for investigating subsurface density variations relevant to mineral exploration, geothermal assessment, carbon storage, natural hydrogen, groundwater resources, and tectonic evolution. Here…

地球物理 · 物理学 2026-04-07 Pankaj K Mishra , Sanni Laaksonen , Jochen Kamm , Anand Singh

Very long baseline interferometry (VLBI) monitoring of the 6.7 GHz methanol maser allows us to measure the internal proper motions of the maser spots and therefore study the gas motion around high-mass young stellar objects. To this end, we…

We propose and study a continuum model for the dynamics of amorphizable surfaces undergoing ion-beam sputtering (IBS) at intermediate energies and oblique incidence. After considering the current limitations of more standard descriptions in…

材料科学 · 物理学 2009-11-13 Javier Muñoz-García , Rodolfo Cuerno , Mario Castro

Exploration of Mars has been made possible using a series of landers, rovers and orbiters. The HiRise camera on the Mars Reconnaissance Orbiter (MRO) has captured high-resolution images covering large tracts of the surface. However, orbital…

天体物理仪器与方法 · 物理学 2019-02-18 Adrien Bouskela , Aman Chandra , Jekan Thangavelautham , Sergey Shkarayev

Unmanned Aerial Vehicles (UAVs) equipped with LiDAR, electro-optical and infrared cameras, SAR and atmospheric sensors have transformed the way we acquire high spatio-temporal resolution data. For example, UAVs equipped with these sensors…

计算机与社会 · 计算机科学 2016-09-20 M. Ani Hsieh , Srikanth Saripalli , Gaurav Sukhatme , Vijay Kumar

Soil moisture (SM) estimation from active microwave data remains challenging due to the complex interactions between radar backscatter and surface characteristics. While the water cloud model (WCM) provides a semi-physical approach for…

机器学习 · 计算机科学 2025-05-02 Yi Yu , Patrick Filippi , Thomas F. A. Bishop

The visual detection and tracking of surface terrain is required for spacecraft to safely land on or navigate within close proximity to celestial objects. Current approaches rely on template matching with pre-gathered patch-based features,…

计算机视觉与模式识别 · 计算机科学 2024-10-08 Timothy Chase , Karthik Dantu

This work is concerned with the estimation of radial velocities of sea surface elevations. The data, is a noisy along-track interferometric synthetic aperture radar (AT-INSAR) image. We assume the Velocity Bunching Model. This model relates…

数值分析 · 数学 2022-01-05 Fabricio Perez , Miguel Angel Moreles , Hector Morales

Huge imbalance of different scenes' sample numbers seriously reduces Synthetic Aperture Radar (SAR) ship detection accuracy. Thus, to solve this problem, this letter proposes a Balance Scene Learning Mechanism (BSLM) for offshore and…

计算机视觉与模式识别 · 计算机科学 2020-09-22 Tianwen Zhang , Xiaoling Zhang , Jun Shi , Shunjun Wei , Jianguo Wang , Jianwei Li , Hao Su , Yue Zhou

Maps of the magnetic field at the Sun's surface are commonly used as boundary conditions in space-weather modeling. However, continuous observations are only available from the Sun's Earth-facing side. One commonly used approach to mitigate…

太阳与恒星天体物理 · 物理学 2024-12-02 Dan Yang , Stephan G. Heinemann , Robert H. Cameron , Laurent Gizon

Using high-resolution ring analysis (HRRA) we deduce subsurface flows within magnetic active regions and within quiet sun. With this procedure we are capable of measuring flows with a horizontal spatial resolution of 2 degrees in…

太阳与恒星天体物理 · 物理学 2011-02-11 Bradley W. Hindman , Deborah A. Haber , Juri Toomre

Onsite disasters like earthquakes can trigger cascading hazards and impacts, such as landslides and infrastructure damage, leading to catastrophic losses; thus, rapid and accurate estimates are crucial for timely and effective post-disaster…

机器学习 · 计算机科学 2024-03-21 Xuechun Li , Paula M. Burgi , Wei Ma , Hae Young Noh , David J. Wald , Susu Xu

This study experimentally investigates the aerodynamic drag reduction capabilities of distributed micro-roughness (DMR) coatings on a streamlined model, utilising the 1-m magnetic suspension and balance system (MSBS) at Tohoku University.…

流体动力学 · 物理学 2026-04-21 Aiko Yakeno , Hiroyuki Okuizumi , Kento Inokuma , Yoshiyuki Watanabe

Understanding the state of changed areas requires that precise information be given about the changes. Thus, detecting different kinds of changes is important for land surface monitoring. SAR sensors are ideal to fulfil this task, because…

计算机视觉与模式识别 · 计算机科学 2023-07-18 Weiying Zhao , Charles-Alban Deledalle , Loïc Denis , Henri Maître , Jean-Marie Nicolas , Florence Tupin

Assessing the environmental impact of the mineral extraction industry plays a critical role in understanding and mitigating the ecological consequences of extractive activities. This paper presents MineSegSAT, a model that presents a novel…

计算机视觉与模式识别 · 计算机科学 2023-11-06 Ezra MacDonald , Derek Jacoby , Yvonne Coady

We address the problem of registering two surfaces, of which a natural bijection between them does not exist. More precisely, only a partial subset of the source surface is assumed to be in correspondence with a subset of the target…

计算几何 · 计算机科学 2020-04-10 Di Qiu , Lok-Ming Lui

The low surface brightness (LSB) regime ($\mu_{g} \gtrsim 26$ mag arcsec$^{-2}$) comprises a vast, mostly unexplored discovery space, from dwarf galaxies to the diffuse interstellar medium. Accessing this regime requires precisely removing…

星系天体物理 · 物理学 2024-01-24 A. E. Watkins , S. Kaviraj , C. C. Collins , J. H. Knapen , L. S. Kelvin , P. -A. Duc , J. Román , J. C. Mihos

The lack of offshore seismic data caused uncertainties associated to understating the behavior of future tsunamigenic earthquakes in the Makran Subduction Zone (MSZ). Future tsunamigenic events in the MSZ may trigger significant near-field…

地球物理 · 物理学 2020-02-20 Amin Rashidi , Zaher Hossein Shomali , Denys Dutykh , Nasser Keshavarz Faraj Khah

Inverse analysis has been utilized to understand unknown underground geological properties by matching the observational data with simulators. To overcome the underconstrained nature of inverse problems and achieve good performance, an…

计算物理 · 物理学 2022-08-10 Hao Wu , Sarah Greer , Daniel O'Malley
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