The NBR operator algorithm computes the Normalized Burn Ratio from a given product.

The NBR results from the following equation:

NBR = (N - S2) / (N + S2)

, where:

The bands are:

- N is the NIR band
- S2 is the SWIR 2 band

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

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