TIMED SEE Level2B: Solar Irradiance Occultation Measurements

TIMED SEE Level2B EGS Occultations Data contains processed solar irradiance measurements transmitted through the atmosphere. The EUV Grating Spectrograph aboard SEE performs these observations 4 times per year, averaging data over each measurement with a resolution of about 0.4 nm and sampling at 0.1 nm from ~27-190 nm. The dataset is produced by the National Aeronautics and Space Administration and was last updated on March 13, 2026.

Use Cases

• Model atmospheric absorption profiles based on solar irradiance transmitted through the atmosphere.
• Analyze temporal variations in solar spectral irradiance based on the 14-15 daily measurements.
• Validate satellite instrument calibration using the ratio of occultation to direct solar observations.
• Study the Earth's upper atmosphere using the specific wavelength range (~27-190 nm).

Strengths

• Data is sampled at a high resolution of 0.1 nm across a defined wavelength range (~27-190 nm).
• Observations are performed 4 times per year, providing regular seasonal snapshots.
• Each measurement is time-averaged and normalized against direct solar observations.

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

Observations from the EUV Grating Spectrograph aboard the TIMED SEE satellite.

Freshness

Last updated 2026-03-13 09:36:38.939645; freshness should be verified.