Research Article
Spatial Differentiation Analysis of Water Quality in Dianchi Lake Based on GF-5 NDVI Characteristic Optimization
Table 3
Characteristic bands of Caohai and Waihai in the near-infrared band.
| Area | Band | Reflectance value (%) | Band characteristics |
| Caohai | B99 (810 nm) | 0.85 | Reflection peak 1 | B151 (1005 nm) | 1.84 | Reflection peak 2, max | B203 (1444 nm) | 0.98 | Reflection peak 3 | B264 (1957 nm) | 0.66 | Reflection peak 4 | B271 (2016 nm) | 0.52 | Reflection peak 5 | B129 (938 nm) | 0.25 | Absorption valley 1 | B166 (1131 nm) | 0.50 | Absorption valley 2 | B206 (1469 nm) | 0.34 | Absorption valley 3 | B268 (1991 nm) | 0.17 | Absorption valley 4 | B285 (2134 nm) | 0.11 | Absorption valley 5, min | | 0.45 | Mean |
| Waihai | B99 (810 nm) | 1.24 | Reflection peak 1, max | B151 (1005 nm) | 0.79 | Reflection peak 2 | B203 (1444 nm) | 0.39 | Reflection peak 3 | B264 (1957 nm) | 0.70 | Reflection peak 4 | B271 (2016 nm) | 0.75 | Reflection peak 5 | B129 (938 nm) | 0.15 | Absorption valley 1 | B166 (1131 nm) | 0.08 | Absorption valley 2, min | B206 (1469 nm) | 0.08 | Absorption valley 3 | B268 (1991 nm) | 0.29 | Absorption valley 4 | B285 (2134 nm) | 0.26 | Absorption valley 5 | | 0.42 | Mean |
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