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We use the Slovak and Czech video meteor observations, as well as video meteoroid orbits collected in the CAMS, SonotaCo, EDMOND and DMS catalogues, for an analysis of the distribution of meteoroid orbits within the stream of the Geminids…

Earth and Planetary Astrophysics · Physics 2017-06-28 Maria Hajdukova , Pavel Koten , Leonard Kornos , Juraj Toth

Meteor and bolide phenomena caused by the atmospheric ablation of incoming meteoroids are predicted to occur at the planet Venus. Their systematic observation would allow to measure and compare the sub-mm to m meteoroid flux at different…

Earth and Planetary Astrophysics · Physics 2024-05-31 Apostolos A. Christou , Maria Gritsevich

Rain streaks bring serious blurring and visual quality degradation, which often vary in size, direction and density. Current CNN-based methods achieve encouraging performance, while are limited to depict rain characteristics and recover…

Image and Video Processing · Electrical Eng. & Systems 2021-06-15 Xiang Chen , Yufeng Huang , Lei Xu

Single image rain streak removal is an extremely challenging problem due to the presence of non-uniform rain densities in images. We present a novel density-aware multi-stream densely connected convolutional neural network-based algorithm,…

Computer Vision and Pattern Recognition · Computer Science 2018-02-22 He Zhang , Vishal M. Patel

We present HST/ACS imaging of twenty-three very low surface brightness ($\mu_{e,V}$=25-27.5) galaxies detected in the fields of four nearby galaxy groups. These objects were selected from deep optical imaging obtained with the Dragonfly…

The Dragonfly Telephoto Array employs a unique design to detect very large and diffuse galaxies, which might be missed with conventional telescopes. The Dragonfly Ultrawide Survey (DFUWS) is a new wide-field survey which will cover 10,000…

18 mm-sized Orionid meteoroids were captured in 2019 and 2020 by the Canadian Automated Observatory's mirror tracking system. Meteor position measurements were made to an accuracy of $\sim1$ m and the meteors were tracked to a limiting…

Earth and Planetary Astrophysics · Physics 2023-10-20 Denis Vida , Peter G. Brown , Margaret Campbell-Brown , Auriane Egal

Thermal infrared observations are the most effective way to measure asteroid diameter and albedo for a large number of near-Earth objects. Major surveys like NEOWISE, NEOSurvey, ExploreNEOs, and NEOLegacy find a small fraction of high…

On February 16, 2021, an artificial object was recorded by the Spanish Meteor Network (SPMN) moving slowly over the Mediterranean. From the astrometric measurements, we identify this event as the reentry engine burn of a SpaceX Falcon 9…

Earth and Planetary Astrophysics · Physics 2024-05-29 Eloy Peña-Asensio , Josep M. Trigo-Rodríguez , Marco Langbroek , Albert Rimola , Antonio J. Robles

There is an unceasing incoming flux of extraterrestrial materials reaching the Earth's atmosphere. Some of these objects produce luminous columns when they ablate during the hypersonic encounter with air molecules. A few fireballs occur…

Earth and Planetary Astrophysics · Physics 2024-05-29 E. Peña-Asensio , J. M. Trigo-Rodríguez , A. Rimola

Ship detection has been playing a significant role in the field of remote sensing for a long time but it is still full of challenges. The main limitations of traditional ship detection methods usually lie in the complexity of application…

Computer Vision and Pattern Recognition · Computer Science 2018-06-13 Xue Yang , Hao Sun , Kun Fu , Jirui Yang , Xian Sun , Menglong Yan , Zhi Guo

Cloud detection plays a very important role in the process of remote sensing images. This paper designs a super-pixel level cloud detection method based on convolutional neural network (CNN) and deep forest. Firstly, remote sensing images…

Computer Vision and Pattern Recognition · Computer Science 2018-10-22 Han Liu , Dan Zeng , Qi Tian

We present the first full release of a survey of the 150 MHz radio sky, observed with the Giant Metrewave Radio Telescope between April 2010 and March 2012 as part of the TGSS project. Aimed at producing a reliable compact source survey,…

Cosmology and Nongalactic Astrophysics · Physics 2017-02-08 H. T. Intema , P. Jagannathan , K. P. Mooley , D. A. Frail

HEALPix -- the Hierarchical Equal Area iso-Latitude Pixelization -- is a versatile data structure with an associated library of computational algorithms and visualization software that supports fast scientific applications executable…

Astrophysics · Physics 2011-05-05 K. M. Gorski , E. Hivon , A. J. Banday , B. D. Wandelt , F. K. Hansen , M. Reinecke , M. Bartelman

Object detection in unmanned aerial vehicle (UAV) images remains a highly challenging task, primarily caused by the complexity of background noise and the imbalance of target scales. Traditional methods easily struggle to effectively…

Computer Vision and Pattern Recognition · Computer Science 2026-04-06 Wenfeng Zhang , Jun Ni , Yue Meng , Xiaodong Pei , Wei Hu , Qibing Qin , Lei Huang

We present a deployed system for on-orbit wildfire detection aboard a nine-satellite commercial thermal infrared constellation, operating under demanding joint constraints: sub-megabyte model footprint, sub-150 ms per-batch TensorRT FP16…

We report on a pencil-beam survey of the Taurid Swarm, a possible concentration of bodies in the Taurid meteoroid stream associated with the 7:2 mean-motion resonance with Jupiter. Canada-France-Hawaii Telescope MegaCam observations…

Earth and Planetary Astrophysics · Physics 2025-06-05 Paul Wiegert , Denis Vida , David L. Clark , Auriane Egal , Richard Wainscoat , Robert Weryk

We describe an empirical, self-contained method to isolate faint, large-scale emission in imaging data of low spatial resolution. Multi-resolution filtering (MRF) uses independent data of superior spatial resolution and point source depth…

The Vera C. Rubin Observatory Wide-Fast Deep (WFD) sky survey will reach unprecedented surface brightness depths over tens of thousands of square degrees. Surface brightness photometry has traditionally been a challenge. Current algorithms…

Instrumentation and Methods for Astrophysics · Physics 2023-01-25 Lee S. Kelvin , Imran Hasan , J. Anthony Tyson

We present fundamental atmospheric parameters (Teff and log g) and metallicities ([M/H]) for 507,513 M dwarf stars using low-resolution spectra (R~1800) from LAMOST DR10. By employing Cycle-StarNet, an innovative domain adaptation approach,…

Solar and Stellar Astrophysics · Physics 2025-02-05 Shuo Zhang , Hua-Wei Zhang , Yuan-Sen Ting , Rui Wang , Teaghan O'Briain , Hugh R. A. Jones , Derek Homeier , A-Li Luo
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