ICON EUV: Extreme Ultraviolet Spectrograph Images of Daytime O+ Profiles

ICON_L2-6_EUV NetCDF4 files contain one day (24 hours) of processed satellite imagery data. The primary data product is the O+ (atomic oxygen ion) profile derived from a retrieval algorithm, alongside other geophysical parameters. The data is produced by the National Aeronautics and Space Administration from Level 1 EUV instrument files.

Use Cases

• Retrieving daytime O+ density profiles based on the primary data product from the inversion.
• Analyzing instrument geometry and exposure timing based on the 'support data' var_type containing parameters used in the retrieval.
• Studying the forward model used in the inversion based on parameters with a 'model' dimension.
• Investigating data quality and debugging based on parameters in the 'ignore_data' var_type, though these are not for publication.

Strengths

• Data is structured into three distinct var_types (data, support_data, ignore_data) for clear usage guidance.
• Each file nominally contains a full 24-hour period of data, providing daily temporal coverage.
• The retrieval methodology for the primary O+ product is detailed in a published paper (DOI: 10.1007/s11214-017 0385-1).

Limitations

• Column-level documentation is absent; field semantics must be inferred from the description or inspected after download.
• Row count and total dataset size are unknown, which may limit suitability assessment for large-scale projects.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Produced from ICON L1 EUV instrument files via a retrieval/inversion algorithm.

Time Range

Temporal coverage is per file, with each file containing 1 day of data. The overall date range is not specified.

Freshness

Last updated 2026-03-13 06:32:19.586587; freshness should be verified.

Geography

Spatial coverage is likely global or near-global based on satellite orbit, but not explicitly stated.