The AFRI1600 operator algorithm computes the Aerosol Free Vegetation Index (1600 nm) from a given product.

The AFRI1600 results from the following equation:

AFRI1600 = (N - 0.66 * S1) / (N + 0.66 * S1)

, where:

The bands are:

- N is the NIR band
- S1 is the SWIR 1 band

Also the processor computes an additional flags band called 'afri1600_flags' with the following bit coding:

Bit Position	Description
Bit 0	The computed value for AFRI1600 is NAN or is Infinite
Bit 1	The computed value for AFRI1600 is less than -1 (minus one)
Bit 2	The computed value for AFRI1600 is greater than 1 (one)