| SRI | NDSI | DSI | |||
---|---|---|---|---|---|---|
R2 | Formula | R2 | Formula | R2 | Formula | |
GC (mm) | 0.21 | R1730/R1731 | 0.21 | (R1731-R1730)/(R1731 + R1730) | 0.26 | R2208-R2203 |
PC (%) | 0.66 | R1227/R1177 | 0.68 | (R1227-R1177)/(R1227 + R1177)a | 0.67 | R1227-R1177 |
AC (%) | 0.24 | R1638/R1799 | 0.24 | (R1639-R1799)/(R1639 + R1799) | 0.31 | R2028-R2002 |