Table 2.

Summary of major changes made to the Collection 5.1 MCD64A1 mapping algorithm for Collection 6.

Step/Section	Description of Change
Input data	Algorithm tuned for C6 MODIS surface reflectance and active fire products.
Time series extraction (3.1)	Adopted cloud minimum red-reflectance threshold to override MOD09 cloud mask.
Change summary (3.2)	Temporal window duration W reduced from 10 to 8 days.
Training samples (3.4)	Region growing no longer performed in cropland. New parameter coupling: Rd = 2.5σp.
Separability test (3.6)	Hellinger distance criterion eliminated; ∆VI* percentile criterion relaxed.
Prior probabilities (3.7)	Pmin reduced to 0.01; σp default value reduced to 2 km.
Initial classification (3.9)	Posterior probability threshold reduced from 0.6 to 0.5.
Final classification (3.10)	Majority filter employs projection-aware kernel and is modulated using information derived from training data.