Global Daily BRDF and Albedo Uncertainty Estimates at 1km Resolution

Global daily uncertainty estimates for Bidirectional Reflectance Distribution Function (BRDF) and Albedo are produced at 30 arc-second (approximately 1km) resolution. The dataset is generated by LPCLOUD using 16 days of MODIS data from NASA's Terra and Aqua satellites, temporally weighted to the ninth day of the retrieval period.

Use Cases

• Assess reliability of albedo values in climate models using the BRDF/Albedo QA Uncertainty pixel layer.
• Filter low-quality retrievals for land surface studies by applying the band-specific quality flags.
• Analyze temporal consistency of surface reflectance by leveraging the daily production and 16-day data aggregation.
• Validate BRDF model inversions against the uncertainty range provided for each pixel.

Strengths

• Daily global coverage supports time-series analysis.
• 1km spatial resolution provides data suitable for climate-scale modeling.
• Data incorporates 16 days of MODIS observations for each daily estimate.

Limitations

• Each product file contains only one data layer, limiting immediate multi-band analysis.
• Known issues exist, requiring users to consult external quality assessment resources.
• Large file sizes may pose challenges for storage and processing.

Provenance

Source

LPCLOUD using NASA Terra and Aqua MODIS data.

Collection Method

Produced daily using a 16-day rolling window of MODIS observations.

Freshness

Daily

Geography

Global