ROTI Index: Global Ionospheric Disturbance Maps from GPS TEC, 15-Minute Intervals

World maps and movies of the Rate of TEC change (ROTI) index, a measure of ionospheric disturbance. The data is derived from Total Electron Content (TEC) measurements between GPS satellites and ground receiver stations, calculated at 15-minute intervals. The dataset is provided by the National Aeronautics and Space Administration and was last updated in March 2026.

Use Cases

• Monitor ionospheric scintillation and disturbances based on the ROTI index.
• Analyze global patterns of space weather activity based on the 15-minute TEC rate-of-change data.
• Correlate GPS signal degradation with ionospheric conditions based on the standard deviation of TEC change.
• Visualize the temporal evolution of ionospheric events using the provided world maps and movies.

Strengths

• Data is sourced from the authoritative National Aeronautics and Space Administration.
• Provides a specific, physics-based index (ROTI) derived from GPS TEC measurements.
• Includes visualizations (world maps and movies) alongside the underlying data.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Calculated from Total Electron Content (TEC) measurements between GPS satellites and ground receiver stations.

Time Range

null

Freshness

Last updated 2026-03-13 06:32:09.707311; freshness should be verified.

Geography

Worldwide