The NBRT1 operator algorithm computes the Normalized Burn Ratio Thermal 1 from a given product.

The NBRT1 results from the following equation:

NBRT1 = (N - (S2 * T / 10000.0)) / (N + (S2 * T / 10000.0))

, 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 'nbrt1_flags' with the following bit coding:

Bit Position	Description
Bit 0	The computed value for NBRT1 is NAN or is Infinite
Bit 1	The computed value for NBRT1 is less than -1 (minus one)
Bit 2	The computed value for NBRT1 is greater than 1 (one)