About the Thermal Ion Imager
The Thermal Ion Imager (TII) is part of the Electric Field Instrument (EFI) payload aboard ESA's Swarm constellation of satellites. Each Swarm satellite carries a TII sensor that captures two-dimensional images of the thermal ion distribution in the topside ionosphere, enabling high-resolution measurements of ion drift velocity and electric fields.
This site provides tools for monitoring TII data quality across all three Swarm satellites. TII measurements support studies of ionospheric dynamics, geomagnetic storms, polar electrojets, equatorial plasma irregularities, and the coupling between the magnetosphere, ionosphere, and thermosphere.
Instrument Monitoring
Real-time and archival visualizations of TII sensor health, signal quality, and instrument housekeeping data across all three Swarm satellites.
Open SwarmMovies →Peripheral Anomalies
Statistical analysis and time-series plots of peripheral anomaly events detected by the TII, including occurrence rates, spatial distributions, and trend tracking.
Open PA Statistics →