| GVMI Algorithm Specification | |
The GVMI operator algorithm computes the Global
Vegetation Moisture Index
from a given product.
The GVMI results from the following equation:
GVMI = ((N + 0.1) - (S2 + 0.02)) / ((N + 0.1) + (S2 +
0.02))
, where:
The bands are:
- N is the NIR band
- S2 is the SWIR 2 band
Also the processor computes an additional flags band called 'gvmi_flags' with the following bit coding:
| Bit Position | Description |
|---|---|
| Bit 0 | The computed value for GVMI is NAN or is Infinite |
| Bit 1 | The computed value for GVMI is less than -1 (minus one) |
| Bit 2 | The computed value for GVMI is greater than 1 (one) |