AWARE: an Algorithm for the Automated Characterization of EUV Waves in the Solar Atmosphere

Ireland, Jack ; Inglis, Andrew ; Shih, Albert Y ; Christe, Steven ; Mumford, Stuart ; Hayes, Laura ; Thompson, Barbara ; Hughitt, Keith

关键词: ALGORITHMS;    EXTREME ULTRAVIOLET RADIATION;    SOLAR CORONA;    SOLAR ATMOSPHERE;    CHARACTERIZATION;    IMAGE PROCESSING;   

RP-ID  :  GSFC-E-DAA-TN75955

学科分类：天文学(综合)

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Extreme ultraviolet (EUV) waves are large-scale propagating disturbances observed in the solar corona, frequently associated with coronal mass ejections and flares. They appear as faint, extended structures propagating from a source region across the structured solar corona. To measure these waves, we have constructed the Automated Wave Analysis and REduction (AWARE) algorithm. AWARE is implemented in two stages. In the first stage, we use simple image processing techniques to isolate the propagating, brightening wave fronts as they move across the corona. In the second stage, AWARE measures the distance, velocity and acceleration of that wave front across the Sun. We explore the use of the Huygens principle, dynamic time warping and a simple parametric representation of the wave front as potential methods for detecting and tracking non-radial EUV wave propagation.