The NSDSI2 operator algorithm computes the Normalized Shortwave-Infrared Difference Bare Soil Moisture Index 2 from a given product.

The NSDSI2 results from the following equation:

NSDSI2 = (S1 - S2) / S2

, 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 'nsdsi2_flags' with the following bit coding:

Bit Position	Description
Bit 0	The computed value for NSDSI2 is NAN or is Infinite
Bit 1	The computed value for NSDSI2 is less than -1 (minus one)
Bit 2	The computed value for NSDSI2 is greater than 1 (one)