Normalized Difference Chlorophyll Index (NDCI) estimates chlorophyll concentration in water bodies, helping to monitor algal blooms and water quality. It is calculated by comparing reflectance from wavelengths sensitive to chlorophyll. NDCI values range from -1 to +1, where higher values indicate more chlorophyll and potential algal blooms, while lower values suggest clear water with low chlorophyll concentration. It is useful in managing aquatic ecosystems and monitoring pollution.

Firefly = (B073-B060)/(B073+B060)
Sentinel = (B05-B04)/(B05+B04)