MCD45A1 is a monthly Level-3 gridded 500-meter product, which contains burning and quality assurance information on a per-pixel basis. Produced from both the Terra and Aqua MODIS-derived daily surface reflectance inputs, the algorithm analyzes the daily surface reflectance dynamics to locate rapid changes, uses that information to detect the approximate date of burning, and maps the spatial extent of recent fires only. It provides varied quality assurance assessment information and a single summary quality assurance assessment score for each pixel.
The MCD45A1 algorithm improves on previous methods by using a change detection approach based on modeled bidirectional reflectance distribution function (BRDF) to handle angular variations in the data. It further uses a statistical measure to identify change probability from a previously observed state. A monthly MCD45A1 product is based on three months of atmospherically and geometrically corrected, cloud-screened daily reflectance data.
||Combined Aqua Terra
||MODIS Atmosphere Collection 51 -- Deep Blue (ArchiveSet 51)
|File Naming Convention:
- YYYYDDD = Year and Day of Year of acquisition
- hHH = Horizontal tile number (0-35)
- vVV = Vertical tile number (0-17)
- CCC = Collection number
- YYYYDDDHHMMSS = Production Date and Time
||Climate Change, Fires, Wildfires