Global Ionospheric Maps of Total Electron Content from IGS, 2-Hour Estimates

Global ionospheric maps of total electron content (TEC) estimated every two hours by the International GNSS Service (IGS) Analysis Centre. The data includes rapid and final TEC maps and movies in cylindrical and polar projections, derived from averages of four methods from CODE, ESA, JPL, and UPC. Continuous coverage is not guaranteed.

Use Cases

• Modeling ionospheric delay for GNSS signal correction based on TEC maps.
• Analyzing global ionospheric dynamics based on 2-hourly TEC estimates.
• Visualizing spatial and temporal TEC variations based on cylindrical and polar projection movies.
• Comparing rapid versus final TEC product accuracy based on the provided RMS and error maps.

Strengths

• Data is produced by the International GNSS Service (IGS) Analysis Centre, an authoritative source.
• Includes both rapid and final TEC products, allowing for near-real-time and high-accuracy analysis.
• Maps are provided in multiple projections (cylindrical and polar) for different analytical needs.

Limitations

• Continuous coverage is not guaranteed, which may create data gaps.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

International GNSS Service (IGS) Analysis Centre, aggregated by NASA.

Collection Method

Estimated from GNSS data using averages of four methods (CODE, ESA, JPL, UPC).

Time Range

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Freshness

Last updated 2026-03-13 06:56:08.809403; freshness should be verified.

Geography

Global