Combined MODIS Valid Observation for band 1 data from the MCD43D33 product across the globe, August 10, 2020.View full-size image
The MCD43D33 Version 6.1 Bidirectional Reflectance Distribution Function and Albedo (BRDF/Albedo) QA ValidObs Band 1 dataset is produced daily using 16 days of Terra and Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) data at 30 arc second (1,000 meter (m)) resolution. Data are temporally weighted to the ninth day which is reflected in the Julian date in the file name. This Climate Modeling Grid (CMG) product covers the entire globe for use in climate simulation models. Due to the large file size, each MCD43D product contains just one data layer. MCD43D33 provides MODIS band 1 valid observation quality information for the MCD43D products.
Users are urged to use the band specific quality flags to isolate the highest quality full inversion results for their own science applications as described in the User Guide.
MCD43D33 contains the valid observation quality layer representing each of the 16 days of the retrieval period for MODIS band 1.
|File Size||~161 MB|
|Temporal Extent||2000-02-16 to Present|
|Coordinate System||Geographic Latitude and Longitude|
|Number of Science Dataset (SDS) Layers||1|
|Columns/Rows||43200 x 21600|
|Pixel Size||~1000 m|
|SDS Name||Description||Units||Data Type||Fill Value||No Data Value||Valid Range||Scale Factor|
|Global_BRDF_ValidObs_Band1||Valid Observation for band 1||Bit Field||16-bit unsigned integer||0||N/A||1 to 65535||N/A|
|0||Observation not used|
|1||Valid clear observation|
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 known issues please refer to the MODIS/VIIRS Land Quality Assessment website.