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We describe here a new algorithm to model the water contents of the atmosphere from GNSS slant wet delays relative to a single receiver. We first make the assumption that the water vapor contents are mainly governed by a scale height…

大气与海洋物理 · 物理学 2021-02-04 Jean-Pierre Barriot , Jonathan Serafini , Lydie Sichoix

We validate the Weather Research and Forecasting (WRF) model for precipitable water vapour (PWV) forecasting as a fully operational tool for optimizing astronomical infrared (IR) observations at Roque de los Muchachos Observatory (ORM). For…

天体物理仪器与方法 · 物理学 2018-05-02 Gabriel Pérez Jordán , Julio A. Castro Almazán , Casiana Muñoz Tuñón

This study explores the integration of machine learning into urban aerial image analysis, with a focus on identifying infrastructure surfaces for cars and pedestrians and analyzing historical trends. It emphasizes the transition from…

计算机视觉与模式识别 · 计算机科学 2025-03-21 Miguel Ureña Pliego , Rubén Martínez Marín , Nianfang Shi , Takeru Shibayama , Ulrich Leth , Miguel Marchamalo Sacristán

After 30 years since the beginning of the Global Positioning System (GPS), or, more generally, Global Navigation Satellite System (GNSS) meteorology, this technique has proven to be a reliable method for retrieving atmospheric water vapor;…

大气与海洋物理 · 物理学 2024-01-23 Javier Vaquero-Martinez , Manuel Anton

Long-Short-Term-Memory (LSTM) networks have been used extensively for time series forecasting in recent years due to their ability of learning patterns over different periods of time. In this paper, this ability is applied to learning the…

信号处理 · 电气工程与系统科学 2020-06-30 Mayank Jain , Shilpa Manandhar , Yee Hui Lee , Stefan Winkler , Soumyabrata Dev

Our current capability of space weather prediction in the Earth's radiation belts is limited to only an hour in advance using the real-time solar wind monitoring at the Lagrangian L1 point. To mitigate the impacts of space weather on…

Understanding the dynamics of climate variables is paramount for numerous sectors, like energy and environmental monitoring. This study focuses on the critical need for a precise mapping of environmental variables for national or regional…

应用统计 · 统计学 2026-04-30 Pietro Colombo , Claire Miller , Xiaochen Yang , Ruth O'Donnell , Paolo Maranzano

Supra-arcade downflows (SADs) are dark, sunward-moving structures above the arcade of flare loops. Naturally they are considered to be associated with outflows resulting from magnetic reconnection at the vertical current sheet beneath the…

太阳与恒星天体物理 · 物理学 2025-08-08 Zichao Yang , Rui Liu

Multivariate geo-sensory time series prediction is challenging because of the complex spatial and temporal correlation. In urban water distribution systems (WDS), numerous spatial-correlated sensors have been deployed to continuously…

机器学习 · 计算机科学 2020-04-15 Ziqing Ma , Shuming Liu , Guancheng Guo , Xipeng Yu

We develop a potential algorithm to relate the depth development of ultra high energy extensive air showers and the time delay for individual muons. The time distributions sampled at different positions at ground level by a large air shower…

天体物理学 · 物理学 2009-11-10 L. Cazon , R. A. Vazquez , E. Zas

During the last decades, international attempts have been made to develop realistic space weather prediction tools aiming to forecast the conditions on the Sun and in the interplanetary environment. These efforts have led to the development…

The Meteorology is a field where huge amounts of data are generated, mainly collected by sensors at weather stations, where different variables can be measured. Those data have some particularities such as high volume and dimensionality,…

机器学习 · 计算机科学 2025-10-27 Shadi Aljawarneh , Juan A. Lara , Muneer Bani Yassein

We perform an information-theoretic mode decomposition for separated aerodynamic flows. The current data-driven approach based on a neural network referred to as deep sigmoidal flow enables the extraction of an informative component from a…

流体动力学 · 物理学 2025-08-08 Kai Fukami , Ryo Araki

Accurate marine wind forecasts are essential for safe navigation, ship routing, and energy operations, yet they remain challenging because observations over the ocean are sparse, heterogeneous, and temporally variable. We reformulate wind…

机器学习 · 计算机科学 2025-12-04 Matteo Peduto , Qidong Yang , Jonathan Giezendanner , Devis Tuia , Sherrie Wang

Astronomical observations at millimeter and submillimeter wavelengths heavily depend on the amount of Precipitable Water Vapor (PWV) in the atmosphere, directly affecting the sky transparency and degrading the quality of the signals…

In this article, we investigate theoretical and numerical properties of the first-order Lighthill-Whitham-Richards (LWR) traffic flow model with time delay. Since standard results from the literature are not directly applicable to the…

数值分析 · 数学 2020-03-30 Simone Göttlich , Elisa Iacomini , Thomas Jung

A functional time series approach is proposed for investigating spatial correlation in daily maximum temperature forecast errors for 111 cities spread across the U.S. The modelling of spatial correlation is most fruitful for longer forecast…

统计方法学 · 统计学 2021-11-23 Phillip A. Jang , David S. Matteson

Accurately calculating time delays between signals is pivotal in many modern physics applications. One approach to estimating these delays is computing the cross-spectrum in the time-frequency domain. Linear time-frequency representations,…

计算物理 · 物理学 2026-03-23 L. de A. Gurgel , J. M. de Araújo , L. D. Machado , P. D. S. de Lima

The ALMA observatory is now putting more focus on high-frequency observations (frequencies from 275-950 GHz). However, high-frequency observations often suffer from rapid variations in atmospheric opacity that directly affect the system…

天体物理仪器与方法 · 物理学 2022-12-28 Hao He , William R. F. Dent , Christine Wilson

The observable time delays between the multiple images of strong lensing systems with time variable sources can provide us with some valuable information to probe the expansion history of the Universe. Estimation of these time delays can be…

宇宙学与河外天体物理 · 物理学 2015-06-15 Amir Aghamousa , Arman Shafieloo
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