Department of Space Physics School of Electronic Information Wuhan University Wuhan 430072 China;
Department of Space Physics School of Electronic Information Wuhan University Wuhan 430072 China;
High Altitude Observatory National Center for Atmospheric Research Boulder 80301 Colorado USA;
High Altitude Observatory National Center for Atmospheric Research Boulder 80301 Colorado USA;
Haystack Observatory Massachusetts Institute of Technology Westford 01886 Massachusetts USA;
Department of Physics University of Texas at Arlington Arlington 76013 Texas USA;
Subauroral Polarization Streams; TIEGCM; poleward winds; Universal time change;