VJ119A1: Daily Global Land Surface Reflectance from VIIRS at 375m and 750m Resolution

Global daily land surface reflectance data from the NOAA-20 VIIRS instrument, corrected for atmospheric gases and aerosols using the MAIAC algorithm. The product provides surface spectral reflectance estimates at 375 meter and 750 meter pixel resolutions using a Rotated Sinusoidal projection. Variables include surface reflectance, solar and view geometry angles, and RTLS model kernels for bands M1-M5, M7, M8, M10, M11, and I1-I3.

Use Cases

• Monitor land cover and vegetation changes based on daily surface reflectance data.
• Model surface energy balance and albedo using provided solar and view geometry angles.
• Analyze aerosol impacts on surface retrievals using the atmospheric correction algorithm described.
• Study coastal and desert environments with awareness of the documented artifact and retrieval limitations.

Strengths

• Atmospheric correction applied using the Multi-Angle Implementation of Atmospheric Correction (MAIAC) algorithm.
• Provides data at two spatial resolutions: 375 meters and 750 meters.
• Includes variables for surface reflectance, solar/view geometry, and RTLS model kernels.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Known issues include reduced accuracy at solar zenith angles > 78° and potential missing retrievals over bright salt pans.
• Frequent artifacts may occur 1-3 pixels from coastlines, as noted in the user guide.

Provenance

Source

LPCLOUD via NASA Earthdata, from the NOAA-20 VIIRS instrument.

Collection Method

Satellite remote sensing data processed with the MAIAC atmospheric correction algorithm.

Freshness

Daily production frequency.

Geography

Global coverage.