| GM1 Algorithm Specification | |
The GM1 operator algorithm computes the Gitelson
and Merzlyak Index 1 from a given
product.
The GM1 results from the following equation:
GM1 = RE2 / G
, where:
The bands are:
- G is the Green band
- RE2 is the Red Edge 2 band
- R is the Red band
Also the processor computes an additional flags band called 'gm1_flags' with the following bit coding:
| Bit Position | Description |
|---|---|
| Bit 0 | The computed value for GM1 is NAN or is Infinite |
| Bit 1 | The computed value for GM1 is less than -1 (minus one) |
| Bit 2 | The computed value for GM1 is greater than 1 (one) |