The AWEInsh operator algorithm computes the Automated Water Extraction Index from a given product.

The AWEInsh results from the following equation:

AWEInsh = 4.0 * (G - S1) - 0.25 * N + 2.75 * S2

, where:

The bands are:

- G is the Green band
- N is the NIR band
- S1 is the SWIR 1 band
- S2 is the SWIR 2 band

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

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