Daily Nadir-Adjusted Reflectance for MODIS Band 7 at 1km Resolution

MCD43D68 Version 6.1 provides daily Nadir BRDF-Adjusted Reflectance for MODIS band 7 at a 30 arc second (1km) resolution. The product is generated using 16 days of Terra and Aqua MODIS data, temporally weighted to the ninth day, and covers the entire globe. It is produced by LPCLOUD for use in climate simulation models.

Use Cases

• Modeling land surface albedo for climate simulations using the NBAR values for band 7.
• Analyzing temporal trends in surface reflectance by utilizing the daily temporal weighting and Julian date indexing.
• Assessing data quality for specific regions by applying the band-specific quality flags described in the user guide.
• Studying vegetation or surface properties sensitive to MODIS band 7 wavelengths through the nadir-adjusted reflectance layer.

Strengths

• Global coverage at 1km resolution suitable for climate-scale analysis.
• Daily temporal resolution with data weighted to a central ninth day.
• Algorithm removes view angle effects to provide nadir-view reflectance.

Limitations

• Each product file contains just one data layer, limiting simultaneous multi-band analysis.
• Known issues exist, requiring users to consult external assessment websites.
• The use of 16-day data windows for daily products may smooth or lag rapid surface changes.

Provenance

Source

LPCLOUD using NASA Terra and Aqua MODIS sensor data.

Collection Method

Produced daily using 16 days of MODIS data with a NBAR algorithm.

Time Range

Daily coverage.

Freshness

Daily

Geography

Global.