Chinese Journal of Polar Research

ADVANCES IN POLAR SCIENCE ›› 2011, Vol. 23 ›› Issue (3): 168-177.DOI: 10.3724/SP.J.1084.2011.00168

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A Method for Extracting Auroral Ovals in UVI Images and Its Evaluation

Wang Qian1, Meng Qinghu1, Hu Zejun2, Xing Zanyang2,3, Liang Jimin1, Hu Hongqiao2   

  1. 1.Research Center of Life Science, School of Life Sciences and Technology, Xidian University

    2.SOA Key Laboratory for Polar Science, Polar Research Institute of China

    3 School of Science, Xidian University

  • Received:2011-03-14 Revised:2011-04-27 Online:2011-09-30 Published:2011-09-30
  • Contact: Ze-Jun HU

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Abstract:

The equatorward and poleward boundaries of auroral oval are important geophysical parameters which are closely related with the energy coupling between solar wind and magnetosphere. A new method of acquiring the boundaries of auroral oval in Ultraviolet Auroral Imager (UVI) aboard Polar satellite is evolved from the algorithm named fuzzy local information c-means clustering (FLICM). The method can get the integrated, real boundaries of auroral oval. The results of cross validation based on the precipitating electron boundaries from DMSP satellite precipitation particles data show that the auroral boundaries from new algorithm are more accurate than that from previous methods.

Key words: fuzzy clustering