The NBRT3 operator algorithm computes the Normalized Burn Ratio Thermal 3 from a given product.

The NBRT3 results from the following equation:

NBRT3 = ((N - (T / 10000.0)) - S2) / ((N - (T / 10000.0)) + S2)

, where:

The bands are:

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

Also the processor computes an additional flags band called 'nbrt3_flags' with the following bit coding:

Bit Position	Description
Bit 0	The computed value for NBRT3 is NAN or is Infinite
Bit 1	The computed value for NBRT3 is less than -1 (minus one)
Bit 2	The computed value for NBRT3 is greater than 1 (one)