[PEM16-P07] Neutral and plasma density perturbations in the top-/bottom-side ionosphere associated with MSTIDs
As the first step in the abovementioned research, we compared the MSTID signatures between the CHAMP and ground-based 630-nm airglow measurements to validate the MSTID detection by CHAMP. Airglow imaging is a quite useful technique to investigate two-dimensional characteristics of the nighttime MSTIDs. Horizontal parameters of the MSTIDs (such as wavelengths, motions, and their spatial extent) can be estimated directly with a high spatial and temporal resolutions through the 630-nm airglow emission in the bottom-side F-region. Previous study by Park et al. [2009, JGR] made an investigation of spatial signatures regarding one MSTID event using airglow images along the CHAMP orbit. The Institute for Space-Earth Environmental Research, Nagoya University, has operated airglow imaging network, as the OMTI system, around the world since 2000; this network gives much more chance to make coordinated measurements with CHAMP. We found three clear MSTID events (March 15, 2004, February 15, 2007, and January 12, 2007) in which CHAMP passed over the field-of-views of the OMTI camera.
In this presentation, we will report phase relations between the neutral and plasma density perturbations associated with the MSTID events.