Vertical Behavior of TADs/TIDs using SAMI3 driven by GITM

We investigate the vertical behavior of Traveling Atmospheric/Ionospheric Disturbances (TADs/TIDs) using model results from SAMI3 (SAMI Is Another Model of the Ionosphere). SAMI3, by default, uses MSIS for the neutral atmosphere which does not generate disturbances. Since we need a 3D model capable of generating disturbances, we are using the results from Global Ionosphere/Thermosphere Model (GITM) to drive SAMI3. We first show how GITM can reliably produce TADs in the case of a simulated extreme storm and how the results of GITM vary depending on which high-latitude driver is used. The GITM outputs are then fed into SAMI3 to study the TIDs produced by the simulated TADs. The simulated storm is used to establish a control and eliminate the variabilities introduced by substorms within a larger storm. Using the results of the GITM/SAMI3 simulations, we investigate the vertical behavior of TIDs in order to attempt to link what is seen in the ionospheric total electron content (TEC) from Global Navigation Satellite System (GNSS) satellites to what is seen in ion density measurements made from the DMSP satellites in the topside ionosphere.