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EUV images of solar flares provided by the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory (SDO/AIA) are often affected by saturation effects in their core, physically most interesting region. We introduce an image…

Solar and Stellar Astrophysics · Physics 2014-07-29 Richard A Schwartz , Gabriele Torre , Michele Piana

Saturation affects a significant rate of images recorded by the Atmospheric Imaging Assembly on the Solar Dynamics Observatory. This paper describes a computational method and a technological pipeline for the de-saturation of such images,…

Instrumentation and Methods for Astrophysics · Physics 2015-03-10 Richard A Schwartz , Gabriele Torre , Anna Maria Massone , Michele Piana

Existing Vision-Language Models (VLMs) are predominantly trained on web-scraped, noisy image-text data, exhibiting limited exposure to the specialized domain of RS. This deficiency results in poor performance on RS-specific tasks, as…

Computer Vision and Pattern Recognition · Computer Science 2026-01-22 Angelos Zavras , Dimitrios Michail , Xiao Xiang Zhu , Begüm Demir , Ioannis Papoutsis

To study and monitor the Sun and its atmosphere, various space missions have been launched in the past decades. With the rapid improvement in technology and different mission requirements, the data products are subject to constant change.…

NASA's Solar Dynamics Observatory (SDO) mission gathers 1.4 terabytes of data each day from its geosynchronous orbit in space. SDO data includes images of the Sun captured at different wavelengths, with the primary scientific goal of…

Image and Video Processing · Electrical Eng. & Systems 2023-05-05 Ali Zafari , Atefeh Khoshkhahtinat , Piyush M. Mehta , Nasser M. Nasrabadi , Barbara J. Thompson , Daniel da Silva , Michael S. F. Kirk

A lot of work has been done to reach the best possible performance of predictive models on images. There are fewer studies about the resilience of these models when they are trained on image datasets that suffer modifications altering their…

Computer Vision and Pattern Recognition · Computer Science 2023-01-19 Pau Gallés , Katalin Takats , Javier Marin

We begin here a series of papers examining the chromospheric and coronal properties of solar active regions. This first paper describes an extensive dataset of images from the Atmospheric Imaging Assembly on the Solar Dynamics Observatory…

Solar and Stellar Astrophysics · Physics 2023-01-25 Karin Dissauer , KD Leka , Eric L. Wagner

Given the rarity of significant solar flares compared to smaller ones, training effective machine learning models for solar activity forecasting is challenging due to insufficient data. This study proposes using generative deep learning…

Solar and Stellar Astrophysics · Physics 2024-04-04 Francesco P. Ramunno , S. Hackstein , V. Kinakh , M. Drozdova , G. Quetant , A. Csillaghy , S. Voloshynovskiy

The variation of solar irradiance is one of the natural forcing mechanisms of the terrestrial climate. Hence, the time-dependent solar irradiance is an important input parameter for climate modelling. The solar surface magnetic field is a…

Solar and Stellar Astrophysics · Physics 2015-05-11 Omar Ashamari , Rami Qahwaji , Stan Ipson , Micha Scholl , Omar Nibouche , Margit Haberreiter

NASA's Solar Dynamics Observatory (SDO) was launched 11 February 2010 with 3 instruments on board, including the Helioseismic and Magnetic Imager (HMI). Since beginning normal operations on 1 May 2010, HMI has observed the Sun's entire…

We review solar studies using AIA, HMI, and EVE data from the SDO spacecraft that revolutionized our physical understanding of the Sun. The relevant SDO studies cover the entire 15-year lifetime of SDO, from 2010 May 1 to 2025 May 1. The…

Solar and Stellar Astrophysics · Physics 2025-07-04 Markus J. Aschwanden

We study the characteristics of a narrow band type Ia supernova survey through simulations based on the upcoming Javalambre Physics of the accelerating universe Astrophysical Survey (J-PAS). This unique survey has the capabilities of…

The multi-wavelength data from the Solar Dynamics Observatory (SDO) is extensively used in studying the physics of the Sun and its atmosphere. In this study, we estimate the formation heights of low-corona and chromospheric channels of the…

Solar and Stellar Astrophysics · Physics 2024-11-08 Y. Sanjay , S. Krishna Prasad , R. Erdelyi , M. B. Korsos , D. Banerjee , P. S. Rawat

This paper introduces a high resolution, machine learning-ready heliophysics dataset derived from NASA's Solar Dynamics Observatory (SDO), specifically designed to advance machine learning (ML) applications in solar physics and space…

DEM analysis is a major diagnostic tool for stellar atmospheres. But both its derivation and its interpretation are notably difficult because of random and systematic errors, and the inverse nature of the problem. We use simulations with…

Solar and Stellar Astrophysics · Physics 2013-06-17 Chloé Guennou , Frédéric Auchère , Elie Soubrié , Karine Bocchialini , Susanna Parenti

The global rotational profile of the solar atmosphere and its variation at different layers, although crucial for a comprehensive understanding of the dynamics of the solar magnetic field, has been a subject to contradictory results…

Recently observed oscillations in the solar atmosphere have been interpreted and modeled as magnetohydrodynamic wave modes. This has allowed the estimation of parameters that are otherwise hard to derive, such as the coronal magnetic-field…

Solar and Stellar Astrophysics · Physics 2010-07-07 Jack Ireland , Michael S. Marsh , Therese A. Kucera , Christopher A. Young

We study properties of waves of frequencies above the photospheric acoustic cut-off of $\approx$5.3 mHz, around four active regions, through spatial maps of their power estimated using data from Helioseismic and Magnetic Imager (HMI) and…

Solar and Stellar Astrophysics · Physics 2015-06-05 S. P. Rajaguru , S. Couvidat , Xudong Sun , K. Hayashi , H. Schunker

The origin of the slow solar wind is still an open issue. One possibility that has been suggested is that upflows at the edge of an active region can contribute to the slow solar wind. We aim to explain how the plasma upflows are generated,…

We demonstrate the use of machine learning algorithms in combination with segmentation techniques in order to distinguish coronal holes and filaments in SDO/AIA EUV images of the Sun. Based on two coronal hole detection techniques…