edu.ucar.opensky::articles:24258 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T06:35:53.771985 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7dz0cp1 Interaction of oppositely traveling medium-scale traveling ionospheric disturbances observed in low latitudes during geomagnetically quiet nighttime 2021-02-01T00:00:00Z publication https://n2t.org/ark:/85065/d7dz0cp1 https://doi.org/10.1029/2020JA028723 Wu, K. author Xu, J. author Wang, Wenbin author Sun, L. author Yuan, W. author UCAR/NCAR - Library publisher In this study, an unusual event of medium-scale traveling ionospheric disturbances (MSTIDs) that propagated in opposite directions was observed by multi-instruments (all-sky imager, global positioning system (GPS), and digisonde) in low latitudes during geomagnetically quiet nighttime. These MSTIDs had wavefronts aligned from northwest to southeast. One MSTID propagated southwestward and another propagated northeastward. They encountered and interacted with each other. Some MSTIDs structures merged into one and disappeared after the interaction. Furthermore, an eastward moving plasma bubble also encountered the MSTIDs and then gradually dissipated during the propagation process. The MSTIDs traveling in opposite directions should be related to ionospheric plasma motion and their trigger mechanisms. The interactive process of MSTIDS involved in plasma drifts and polarization electric fields. Meanwhile, the interaction with an ionospheric irregularity structure can change some of the MSTID characteristics. 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 2021 American Geophysical Union. None eng geoscientificInformation