Daily Global Nadir-Adjusted Surface Reflectance at 1km Resolution

MCD43D65 provides daily Nadir BRDF-Adjusted Reflectance (NBAR) for MODIS band 4, processed from 16 days of Terra and Aqua satellite observations. The dataset is produced by LPCLOUD for the NASA Earthdata platform, offering global coverage at a 30 arc second (approximately 1,000 meter) spatial resolution on a Climate Modeling Grid. Data are temporally weighted to represent the ninth day of each 16-day acquisition period.

Use Cases

• Modeling land surface albedo for climate simulations using the daily NBAR values for MODIS band 4.
• Monitoring vegetation phenology by analyzing time-series trends in the nadir-adjusted reflectance layer.
• Assessing surface reflectance quality by applying the band-specific quality flags to filter full inversion results.
• Studying global surface properties at a consistent 1km scale on a Climate Modeling Grid for inter-annual comparisons.

Strengths

• Daily global coverage facilitates high-temporal-resolution analysis.
• Data integrates observations from two satellite platforms (Terra and Aqua) over a 16-day window for robust retrievals.
• The NBAR algorithm corrects for view-angle effects to model reflectance at local solar noon.

Limitations

• Each product file contains only one data layer, requiring multiple files for multi-band analysis.
• The 1km spatial resolution may be insufficient for studying fine-scale landscape features.
• Users must consult external resources to understand known data issues specific to this version.

Provenance

Source

NASA Earthdata (LPCLOUD)

Collection Method

Produced from 16 days of Terra and Aqua MODIS data using the NBAR algorithm.

Freshness

Daily

Geography

Global