The land use and cover classifications in the MapBiomas collection are based on mosaics generated from Landsat imagery. For each of the evaluated years, a specific mosaic has been produced (2000-2019). Each mosaic is produced by the spatial integration of the different Landsat scenes present and by the temporal integration pixel by pixel. These time intervals were defined based on the strategy to improve the classification results.
You can access the mosaics of MapBiomas Pampa Collection 1 directly on Google Earth Engine through the following public collection (asset):
To download Landsat mosaics from MapBiomas, access the toolkit on Google Earth Engine.