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This image is a false-color representation of the second of four Science Data Sets in the BRDF/Albedo Quality product. Snow_BRDF_Albedo is shown for data acquired between January 17 and February 1, 2007 over the Adriatic Sea, including Italy, Croatia, Bosnia, Serbia, and Albania (h19v04).
The MODerate-resolution Imaging Spectroradiometer (MODIS) BRDF/Albedo Quality product (MCD43B2) describes the overall condition of the other BRDF and Albedo products. The MCD43B2 product contains 16 days of data at 1 km spatial resolution provided as a level-3 gridded data set in Sinusoidal projection, and includes albedo quality, snow conditions, ancillary information, and inversion information.
Both Terra and Aqua data are used in the generation of this product, providing the highest probability for quality input data and designating it as an "MCD," meaning "Combined," product.
Version-5 MODIS BRDF & Albedo products have attained Validation Stage 3.
See Product Description
Science Data Sets for MODIS Terra+Aqua BRDF/Albedo Quality 16-Day L3 Global 1km SIN Grid V005 (MCD43B2):
Science Data Sets
(HDF Layers) 4
|UNITS||BIT TYPE||FILL||VALID RANGE|
|BRDF_Albedo_Quality||Concatenated flags||8-bit unsigned integer||255||0–254|
|Snow_BRDF_Albedo||Concatenated flags||8-bit unsigned integer||255||0–254|
|BRDF_Albedo_Ancillary||Concatenated flags||16-bit unsigned integer||32767||0–32766|
|BRDF_Albedo_Band_Quality||Concatenated flags||32-bit unsigned integer||4294967295||0–4294967294|
One of the more significant differences between the V004 and V005 BRDF/Albedo data products is that the quality information is no longer embedded as a Science Data Set in each product. BRDF/Albedo Quality is now generated as stand alone data in a separate product, MCD43B2, which can be applied to the other BRDF/Albedo products externally through pixel matching.
The table below lists the four Science Data Sets represented in the Quality product, with their associated QC bit legends.
The 1 kilometer BRDF/Albedo products are averages of the 500 meter values found in the MCD43A products. Thus snow free and snow covered 500-m pixels are averaged together and if any of the 500-m pixels were snow-covered the 1km is flagged as snowy.
*NOTE: The first two Quality SDSs (BRDF_Albedo_Quality and Snow_BRDF_Albedo) are not bit packed. They are complete byte words that can be read directly.
|1||Processed, see other QA (magnitude BRDF inversions)|
|0||Processed, good quality (full BRDF inversion)|
|1||Snow albedo retrieved|
|0||Snow-free albedo retrieved|
|1||Land (Nothing else but land)|
|2||Ocean and lake shorelines|
|3||Shallow inland water|
|5||Deep inland water|
|6||Moderate or continental ocean|
|08–14||Solar Zenith Angle at Local Solar Noon|
|00–03||Band 1 Quality|
|0||best quality, 75% or more with best full inversions|
|1||good quality, 75% or more with full inversions|
|2||Mixed, 50% or less full inversions and 25% or less fill values|
|3||All magnitude inversions or 50% or less fill values|
|4||75% or more fill values|
|04–07||Band 2 Quality (see explanation for band 1)|
|08–11||Band 3 Quality (see explanation for band 1)|
|12–15||Band 4 Quality (see explanation for band 1)|
|16–19||Band 5 Quality (see explanation for band 1)|
|20–23||Band 6 Quality (see explanation for band 1)|
|24–27||Band 7 Quality (see explanation for band 1)|
|Temporal Coverage||February 24, 2000 -|
|Area||~10 x 10 lat/long|
|File Size||~0.4 MB|
|Dimensions||1200 x 1200 rows/columns|
|Science Data Sets (SDS HDF Layers)||4|
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