Table 2.
Band math and wavelengths in nm for each algorithm used for chlorophyll-a estimation at Harsha Lake. Float refers to floating point values.
| Chlorophyll-a index algorithms by satellite/sensor | Spatial res. (m) | Band math/wavelengths (nm) |
|---|---|---|
| CASI CI | 1 | −1*((CASI[[23]])−(CASI[[22]]−(CASI[[25]]−CASI[[22]]))) |
| CASI CI | 1 | −1*(((float(686))−(float(672))−((float(714))−(float(672))))) |
| CASI MCI | 1 | ((CASI[[23]])−(CASI[[22]]−(CASI[[25]]-CASI[[22]]))) |
| CASI MCI | 1 | (((float(686))−(float(672))−((float(714))−(float(672))))) |
| CASI FLH | 1 | (CASI[[25]]−(CASI[[27]]+(CASI[[23]]−CASI[[27]]))) |
| CASI FLH | 1 | (float(714))−[float(743) + (float(686)−float(743))] |
| CASI NDCI | 1 | (CASI[[25]]−CASI[[23]])/(CASI[[25]]+CASI[[23]]) |
| CASI NDCI | 1 | (float(714)−float(686))/(float(714) + float(686)) |
| CASI 2BDA | 1 | (CASI[[25]])/(CASI[[22]]) |
| CASI 2BDA | 1 | (float(714))/(float(672)) |
| CASI 3BDA | 1 | ((1/CASI[[22]])−(1/CASI[[25]]))*(CASI[[28]]) |
| CASI 3BDA | 1 | ((1/float(672))−(1/float(714)))*(float(757)) |
| WorldView-2 and −3 NDCI | 1.8 | (WV2[[6]]−WV2[[5]])/(WV2[[6]]+WV2[[5]]) |
| WorldView-2 and −3 NDCI | 1.8 | (float(722)−float(658))/(float(722) + float(658)) |
| WorldView-2 and −3 FLH violet | 1.8 | (WV2[[3]])−(WV2[[5]]+(WV2[[1]]−WV2[[5]])) |
| WorldView-2 and −3 FLH violet | 1.8 | ((float(551))−[float(658) + (float(429)−float(658))]) |
| WorldView-2 2BDA | 1.8 | (WV2[[6]])/(WV2[[5]]) |
| WorldView-2 2BDA | 1.8 | (float(722))/(float(658)) |
| WorldView-2 3BDA | 1.8 | ((1/WV2[[5]])−(1/WV2[[6]]))*(WV2[[7]]) |
| WorldView-2 3BDA | 1.8 | ((1/float(658))−(1/float(722)))*(float(836)) |
| Sentinel-2 NDCI | 20 | (S2[[5]]−S2[[4]])/(S2[[5]]+S2[[4]]) |
| Sentinel-2 NDCI | 20 | (float(708)−float(665))/(float(708) + float(665)) |
| Sentinel-2 FLH violet | 20 | (S2[[3]])−(S2[[4]]+(S2[[2]]−S2[[4]])) |
| Sentinel-2 FLH violet | 20 | ((float(558))−[float(665) + (float(493)−float(665))]) |
| Sentinel-2 2BDA | 20 | (S2[[5]])/(S2[[4]]) |
| Sentinel-2 2BDA | 20 | (float(708))/(float(665)) |
| Sentinel-2 3BDA | 20 | ((1/S2[[4]])−(1/S2[[5]]))*(S2[[9]]) |
| Sentinel-2 3BDA | 20 | ((1/float(665))−(1/float(708)))*(float(864)) |
| *Landsat-8 NIR band is far from chlorophyll-a peak Landsat-8 NDCI |
30 | (L8[[5]]−L8[[4]])/(L8[[5]]+L8[[4]]) |
| Landsat-8 NDCI | 30 | (float(864)−float(658))/(float(864) + float(658)) |
| Landsat-8 SABI | 30 | (L8[[5]]−L8[[4]])/(L8[[2]]+L8[[3]]) |
| Landsat-8 SABI | 30 | (float(864)−float(658))/(float(479) + float(558)) |
| Landsat-8 FLH blue | 30 | (L8[[3]])−(L8[[4]]+(L8[[2]]−L8[[4]])) |
| Landsat-8 FLH blue | 30 | (float(558))−[float(657) + (float(480)−float(658))] |
| Landsat-8 FLH violet | 30 | (L8[[3]])−(L8[[4]]+(L8[[1]]−L8[[4]])) |
| Landsat-8 FLH violet | 30 | (float(558))−[float(658) + (float(443)−float(658))] |
| Landsat-8 2BDA | 30 | (L8[[5]])/(L8[[4]]) |
| Landsat-8 2BDA | 30 | (float(864))/(float(658)) |
| Landsat-8 KIVU (3BDA-like) | 30 | (L8[[2]]−L8[[4]])/(L8[[3]]) |
| Landsat-8 KIVU (3BDA-like) | 30 | (float(479)−float(658))/(float(558)) |
| Landsat-8 3BDA | 30 | ((1/L8[[2]])−(1/L8[[4]]))*(L8[[3]]) |
| Landsat-8 3BDA | 30 | ((1/float(479))−(1/float(658)))*(float(558)) |
| MODIS NDCI | 250 | (MODIS[[2]]−MODIS[[1]])/(MODIS[[2]]+MODIS[[1]]) |
| MODIS NDCI | 250 | (float(857)−float(644))/(float(857) + float(644)) |
| MODIS 2BDA | 250 | (MODIS[[2]])/(MODIS[[1]]) |
| MODIS 2BDA | 250 | (float(857))/(float(644)) |
| MERIS CI | 300 | (−1*((MERIS[[8]])−(MERIS[[7]])−((MERIS[[9]])−(MERIS[[7]])))) |
| MERIS CI | 300 | −1*(((float(679))−(float(665))−((float(708))−(float(665))))) |
| MERIS MCI | 300 | ((MERIS[[9]])−(MERIS[[8]])−((MERIS[[10]])−(MERIS[[8]]))) |
| MERIS MCI | 300 | (((float(708))−(float(679))−((float(750))−(float(679))))) |
| MERIS FLH | 300 | (MERIS[[9]])−(MERIS[[10]]+(MERIS[[8]]−MERIS[[10]])) |
| MERIS FLH | 300 | (float(708))−[float(750) + (float(679)−float(750))] |
| MERIS NDCI | 300 | (MERIS[[9]]−MERIS[[7]])/(MERIS[[9]]+MERIS[[7]]) |
| MERIS NDCI | 300 | (float(708)−float(665))/(float(708) + float(665)) |
| MERIS 2BDA | 300 | (MERIS[[9]])/(MERIS[[7]]) |
| MERIS 2BDA | 300 | (float(708))/(float(665)) |
| MERIS 3BDA | 300 | ((1/MERIS[[7]])−(1/MERIS[[9]]))*(MERIS[[11]]) |
| MERIS 3BDA | 300 | ((1/float(665))−(1/float(708)))*(float(764)) |