BBlue.
The New Water Index (NWI) is a water spectral index intended for multispectral sensing. Consult its original source .
(B - (N + S1 + S2))/(B + (N + S1 + S2))BBlue.
NNear-Infrared (NIR).
S1Short-wave Infrared (SWIR) 1.
S2Short-wave Infrared (SWIR) 2.