The BaIn operator algorithm computes the Bareness Index from a given product.

The BaIn results from the following equation:

BaIn = R + S1 - N

, where:

The bands are:

- R is the Red band
- N is the NIR band
- S1 is the SWIR 1 band

Also the processor computes an additional flags band called 'bain_flags' with the following bit coding:

Bit Position	Description
Bit 0	The computed value for BaIn is NAN or is Infinite
Bit 1	The computed value for BaIn is less than -1 (minus one)
Bit 2	The computed value for BaIn is greater than 1 (one)