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The projection of shadows from moving clouds in the troposphere impacts energy generation in power grids using photovoltaic systems. This investigation proposes an efficient method of data processing for the statistical quantification of…

Instrumentation and Methods for Astrophysics · Physics 2023-09-21 Guillermo Terrén-Serrano , Manel Martínez-Ramón

The Southern Galactic Plane Survey (SGPS) is a 1.4 GHz radio polarization and HI survey in a large part of the inner Galactic plane at a resolution of about an arcmin. Depolarization and Faraday rotation of polarized radiation from diffuse…

The Hyperspectral image (HSI) contains several hundred bands of the same region called the Ground Truth (GT). The bands are taken in juxtaposed frequencies, but some of them are noisily measured or contain no information. For the…

Computer Vision and Pattern Recognition · Computer Science 2022-10-31 Hasna Nhaila , Maria Merzouqi , Elkebir Sarhrouni , Ahmed Hammouch

This paper introduces the data cubes from GHIGLS, deep Green Bank Telescope surveys of the 21-cm line emission of HI in 37 targeted fields at intermediate Galactic latitude. The GHIGLS fields together cover over 1000 square degrees at 9.55'…

Summarizes current status of radio interferometry at radio frequencies between Earth-based receivers, for astrometric and geodetic applications. Emphasizes theoretical models of VLBI observables that are required to extract results at the…

Astrophysics · Physics 2008-11-26 Ojars J. Sovers , John L. Fanselow , Christopher S. Jacobs

Rainfall precipitation maps are usually derived based on the measurements collected by classical weather devices, such as rain gauges and weather stations. This article aims to show the benefits obtained by opportunistic rainfall…

The goal of cross-view image based geo-localization is to determine the location of a given street view image by matching it against a collection of geo-tagged satellite images. This task is notoriously challenging due to the drastic…

Computer Vision and Pattern Recognition · Computer Science 2021-03-12 Aysim Toker , Qunjie Zhou , Maxim Maximov , Laura Leal-Taixé

Global Navigation Satellite Systems (GNSS) are a widely used technology for positioning and navigation. GNSS positioning relies on pseudorange measurements from satellites to receivers. A pseudorange is the apparent distance between two…

Signal Processing · Electrical Eng. & Systems 2024-06-26 Colin Cros , Pierre-Olivier Amblard , Christophe Prieur , Jean-François Da Rocha

New, more detailed calculations of the emission spectra of the He-like K ALPHA complex of calcium, iron and nickel have been carried out using data from both distorted-wave and R-matrix calculations. The value of the GD ratio (an extended…

Astrophysics · Physics 2009-11-13 J. Oelgoetz , C. J. Fontes , H. L. Zhang , S. N. Nahar , A. K. Pradhan

The precise measurement of the sky-averaged HI absorption signal between 50 and 200 MHz is the primary goal of global 21-cm cosmology. This measurement has the potential to unravel the underlying physics of cosmic structure formation and…

Cosmology and Nongalactic Astrophysics · Physics 2024-12-04 Emma Shen , Dominic Anstey , Marta Spinelli , Eloy de Lera Acedo , Anastasia Fialkov

Light wave-packets propagating from the Earth to satellites will be deformed by the curved background spacetime of the Earth, thus influencing the quantum state of light. We show that Gaussian coherence of photon pairs, which are initially…

Quantum Physics · Physics 2019-10-11 Tonghua Liu , Shumin Wu , Shuo Cao

Neutral atomic hydrogen (HI) observations are fundamental to understand the dynamics of galaxies, their assembly, the fuelling of their star formation and environmental interactions. HI studies have so far been limited by the capabilities…

Astrophysics of Galaxies · Physics 2024-08-16 F. M. Maccagni , W. J. G. de Blok

The use of GNSS signals as a source of opportunity for remote sensing applications, GNSS-R, has been a research area of interest for more than a decade. One of the possible applications of this technique is soil moisture monitoring. The…

The sky localization of the gravitational wave (GW) source is an important scientific objective for GW observations. A network of space-based GW detectors dramatically improves the sky localization accuracy compared with an individual…

General Relativity and Quantum Cosmology · Physics 2022-07-06 Chunyu Zhang , Yungui Gong , Chao Zhang

We describe the HI component of the Southern Galactic Plane Survey (SGPS). The SGPS is a large-scale project to image at arcminute resolution the HI spectral line and 21 cm continuum emission in parts of the plane of the Milky Way. The…

Planning for the development of a 3rd generation global gravitational-wave detector array is a multifaceted and complex effort that will necessarily need a high level of community input. Interfacing to extant and new stakeholders in the…

Some results are presented of the Earth's microseismic background. It is assumed that background peaks should correspond to the resonance gravity-wave exchange in the system of two gravity-connected bodies. The microseismic spectrum is…

Astrophysics · Physics 2007-05-23 V. A. Dubrovskiy

High altitude platform station (HAPS), which is deployed in the stratosphere at an altitude of 20-50 kilometres, has attracted much attention in recent years due to their large footprint, line-of-sight links, and fixed position relative to…

Networking and Internet Architecture · Computer Science 2023-04-13 Omid Abbasi , Animesh Yadav , Halim Yanikomeroglu , Ngoc Dung Dao , Gamini Senarath , Peiying Zhu

The Global Navigation Satellite Systems (GNSS), such as the American Global Positioning System (GPS), the Russian GLONASS or the imminent European Galileo, can be used as sources of opportunity for remote sensing of the Oceans. In this…

Atmospheric and Oceanic Physics · Physics 2016-08-16 Estel Cardellach , Serni Ribó , Antonio Rius