MCD43D37 v006

• Observations are weighted to estimate the BRDF/Albedo on the ninth day of the 16-day period.
• MCD43 products use the snow status weighted to the ninth day instead of the majority snow/no-snow observations from the 16-day period.
• Better quality at high latitudes from use of all available observations for the acquisition period. Collection 5 used only four observations per day.
• The MCD43 products use L2G-lite surface reflectance as input.
• When there are insufficient high quality reflectances, a database with archetypal BRDF parameters is used to supplement the observational data and perform a lower quality magnitude inversion. This database is continually updated with the latest full inversion retrieval for each pixel.
• CMG Albedo is estimated using all the clear-sky observations within the 1,000 m grid for MCD43D as opposed to aggregating from the 500 m albedo.

The MODIS BRDF/Albedo products have achieved stage 3 validation.

Quality bit index

The quality layer is stored in an efficient bit-encoded manner. The unpack_sds_bits executable from the LDOPE Tools is available to the user community to help parse and interpret this layer.

For complete information about MCD43D37 known issues refer to the MODIS Land Quality Assessment website.