| SIPI Algorithm Specification | |
The SIPI operator algorithm computes the Structure
Insensitive Pigment Index
from a given product.
The SIPI results from the following equation:
SIPI = (N - A) / (N - R)
, where:
The bands are:
- A is the Aerosols band
- R is the Red band
- N is the NIR band
Also the processor computes an additional flags band called 'sipi_flags' with the following bit coding:
| Bit Position | Description |
|---|---|
| Bit 0 | The computed value for SIPI is NAN or is Infinite |
| Bit 1 | The computed value for SIPI is less than -1 (minus one) |
| Bit 2 | The computed value for SIPI is greater than 1 (one) |