Results 31 to 40 of about 683,959 (300)
A STOCHASTICALLY FORCED TIME DELAY SOLAR DYNAMO MODEL: SELF-CONSISTENT RECOVERY FROM A MAUNDER-LIKE GRAND MINIMUM NECESSITATES A MEAN-FIELD ALPHA EFFECT [PDF]
The Astrophysical Journal, 2014 Fluctuations in the Sun's magnetic activity, including episodes of grand minima such as the Maunder minimum have important consequences for space and planetary environments. However, the underlying dynamics of such extreme fluctuations remain ill-understood.
Hazra, Soumitra +2 more
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Variational Estimation of the Large-scale Time-dependent Meridional Circulation in the Sun: Proofs of Concept with a Solar Mean Field Dynamo Model [PDF]
The Astrophysical Journal, 2017 Abstract We present in this work the development of a solar data assimilation method based on an axisymmetric mean field dynamo model and magnetic surface data. Our midterm goal is to predict quasi-cyclic solar activity. Here we focus on the ability of our algorithm to constrain the deep meridional circulation of the Sun based on solar ...
Hung, Ching Pui +5 more
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North South Asymmetry of Different Solar Activity Features During Solar Cycle 23
, 2009 A study on North South (NS) asymmetry of different solar activity features (DSAF) such as solar proton events, solar active prominences, H alpha flare index, soft X ray flares, monthly mean sunspot area and monthly mean sunspot number were carried out ...
Ataç +40 more
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Dynamic Time Warping (DTW) as a Means of Assessing Solar Wind Time Series
, 2023 Over 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 of appropriate metrics to assess the performance of those tools.
openaire +1 more source
Geodesy and Geodynamics, 2020 Global Positioning System (GPS) services could be improved through prediction of ionospheric delays for satellite-based radio signals. With respect to latitude, longitude, local time, season, solar cycle and geomagnetic activity the Total Electron ...
G. Sivavaraprasad +4 more
doaj +1 more source
On the solar cycle dependence of winds and planetary waves as seen from mid-latitude D1 LF mesopause region wind measurements [PDF]
Annales Geophysicae, 1998 At the Collm Observatory of the University of Leipzig LF D1 low-frequency total reflection night-time wind measurements have been carried out continuously for more than two decades.
C. Jacobi, C. Jacobi
doaj +1 more source
Журнал інженерних наук, 2022 Enhancing solar irradiance and accurate forecasting is required for improved performance of photovoltaic and solar thermal systems. In this study, Extreme Gradient Boosting (XGBoost) model was developed using three input parameters (time, day number, and
Mbah O. M. +3 more
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, 2012 Solar five-minute oscillations have been detected in the power spectra of two six-day time intervals from soft X-ray measurements of the Sun observed as a star using the Extreme Ultraviolet Spectrophotometer (ESP) onboard the Solar Dynamics Observatory ...
Didkovsky, Leonid +4 more
core +1 more source
Short-Term Solar Irradiance Prediction Based on Adaptive Extreme Learning Machine and Weather Data
Sensors, 2022 Concerns over fossil fuels and depletable energy sources have motivated renewable energy sources utilization, such as solar photovoltaic (PV) power. Utilities have started penetrating the existing primary grid with renewable energy sources.
Ahmad Alzahrani
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Kalman filter model, as a tool for short-term forecasting of solar potential: case of the Dakar site
E3S Web of Conferences, 2018 The prediction of solar potential is an important step toward the evaluation of PV plant production for the best energy planning. In this study, the discrete Kalman filter model was implemented for short-term solar resource forecasting one the Dakar site
Mbaye A. +8 more
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