MODIS Daily Global BRDF Albedo Quality Flags

Daily global quality information for MODIS band 1 albedo retrievals is produced by NASA's LPCLOUD using 16 days of Terra and Aqua satellite data. The data are temporally weighted to the ninth day of the retrieval period and provided at a 30 arc-second (approximately 1 km) resolution on a Climate Modeling Grid.

Use Cases

• Filtering high-quality albedo retrievals for climate models using the band 1 valid observation quality layer.
• Assessing temporal consistency of land surface reflectance by analyzing the 16-day valid observation quality flags.
• Masking unreliable albedo data in regional studies by applying the quality flags specific to MODIS band 1.

Strengths

• Provides daily global coverage on a Climate Modeling Grid suitable for simulations.
• Integrates 16 days of Terra and Aqua MODIS observations for each retrieval.
• Offers band-specific quality flags for isolating high-quality full inversion results.

Limitations

• Each product file contains only one data layer, limiting simultaneous analysis of multiple bands.
• Data resolution is 1 km, which may be insufficient for fine-scale local environmental studies.
• Known issues exist, requiring users to consult external quality assessment resources.

Provenance

Source

NASA LPCLOUD via Terra and Aqua MODIS instruments.

Collection Method

Produced daily using 16 days of MODIS data, temporally weighted to the ninth day.

Freshness

Daily

Geography

Global