The AFRI2100 operator algorithm computes the Aerosol Free Vegetation Index (2100 nm) from a given product.

The AFRI2100 results from the following equation:

AFRI2100 = (N - 0.5 * S2) / (N + 0.5 * 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 'afri2100_flags' with the following bit coding:

Bit Position	Description
Bit 0	The computed value for AFRI2100 is NAN or is Infinite
Bit 1	The computed value for AFRI2100 is less than -1 (minus one)
Bit 2	The computed value for AFRI2100 is greater than 1 (one)