Recognizing methods for epicenter-neighboring orbits with ionospheric information from DEMETER satellite data

Due to the temporal and spatial restriction of existing approaches, a recognizing method focuses on all strong seismic activities in globe during the lifecycle of DEMETER (Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions) is proposed for epicenter-neighboring orbits from the point of view of the Fourth Paradigm. Satellite orbits are regarded as the analyzing objects to reduce the unbalance between the quantity of non-seismic and abnormal data. Two criteria, α3 and α4 are put forward to quantify the asymmetry and stability of ionospheric parameters along the orbit and t location-scale distribution is carried out to fit the quantitative indicators. Moreover, during the distribution fitting, the probable cause of two typical types of exceptions are analyzed and explained. In order to determine which magnitude the abnormal α3 and α4 are caused by, suitable pairs of thresholds are calculated by means of dynamic time warping (DTW) distance. Finally, three groups of experiments are applied to validate the effectiveness of this method.