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

The NBRSWIR results from the following equation:

NBRSWIR = (S2 - S1 - 0.02) / (S2 + S1 + 0.1)

, where:

The bands are:

- S1 is the SWIR 1 band
- S2 is the SWIR 2 band

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

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