TOMSN7L3zref: Daily Zonal Mean Surface Reflectivity from Nimbus-7

Nimbus-7 satellite data from 1978 to 1993 provides daily Lambertian effective surface reflectivity values, Rayleigh corrected and averaged in 5-degree latitude bands. This dataset, produced by NASA Goddard's Laboratory for Atmospheres, supports the study of atmospheric radiation and surface albedo. The data is stored in ASCII format and represents a foundational record for pre-1990s Earth observation.

Use Cases

• Analyzing long-term trends in Earth's surface reflectivity (albedo) based on daily, latitude-averaged measurements.
• Calibrating or validating contemporary atmospheric radiation models using historical satellite-derived reflectivity data.
• Studying the spatial distribution of surface reflectance features averaged within 5-degree zonal bands.

Strengths

• Data originates from the authoritative NASA Goddard Space Flight Center (Code 614), Laboratory for Atmospheres.
• Provides a consistent, daily time-series record from the Nimbus-7 mission, a key historical satellite.
• Cross-platform presence on NASA Earthdata and Data.gov signals its importance as a reference dataset.

Limitations

• Critical metadata conflicts exist: one source lists a last update in 2026 (likely a metadata error), while another shows 1993, creating uncertainty about provenance maintenance.
• Column names and exact row counts are unknown, limiting immediate analytical utility without significant investigation.
• The dataset's temporal coverage ends in 1993, making it a historical record not directly comparable with modern sensor data without expert interpolation.

Provenance

Source

NASA Goddard Space Flight Center, Laboratory for Atmospheres (Code 614).

Collection Method

Measured by the Nimbus-7 satellite's Total Ozone Mapping Spectrometer (TOMS) instrument.

Time Range

1978 to 1993

Freshness

1993-05-06 23:59:59.999000

Geography

Global, data averaged in 5-degree latitude bands.