edu.ucar.opensky::articles:21221 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T16:10:41.560985 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d74x5bd3 Different evolution patterns of subauroral polarization streams (SAPS) during intense storms and quiet time substorms 2017-11-16T00:00:00Z publication https://n2t.org/ark:/85065/d74x5bd3 https://doi.org/10.1002/2017GL075449 He, F. author ZHANG, X. author Wang, Wenbin author Wan, W. author Wan, W. author UCAR/NCAR - Library publisher In this letter, we present multisatellite observations of the evolution of subauroral polarization streams (SAPS) during intense storms (ISs) and quiet time substorms (QSs). SAPS occurred during 37 ISs and 30 QSs were analyzed. Generally, SAPS occur after the southward turning of the interplanetary magnetic field (IMF) with time lags of 0-1.5 h for ISs and 0-2.5 h for QSs. SAPS usually occurred 0-3 h after the beginning of storm main phases and 0-2 h after the substorm expansion onsets. The lifetimes of SAPS are generally longer than the durations of southward IMF and storm main phases. During QSs, the lifetimes of SAPS are shorter than the duration of the ISs. Superposed epoch analysis shows different evolution patterns of SAPS during ISs and QSs. The results of this study provide both physical insight and constrains to modeling the magnetosphere-ionosphere-thermosphere coupling. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2017 American Geophysical Union. None eng geoscientificInformation