| AWEIsh Algorithm Specification | |
The AWEIsh operator algorithm computes the
Automated Water
Extraction Index with
Shadows Elimination from a given
product.
The AWEIsh results from the following equation:
AWEIsh = B + 2.5 * G - 1.5 * (N + S1) - 0.25 * S2
, where:
The bands are:
- B is the Blue band
- 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 'aweish_flags' with the following bit coding:
| Bit Position | Description |
|---|---|
| Bit 0 | The computed value for AWEIsh is NAN or is Infinite |
| Bit 1 | The computed value for AWEIsh is less than -1 (minus one) |
| Bit 2 | The computed value for AWEIsh is greater than 1 (one) |