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Ground measurements of photosynthetically active radiation (PAR) balance and leaf area index (LAI)
are required for validating, and sometimes calibrating biophysical products derived from satellite
...
Estimation of Aerosol Optical Thickness by PAR Radiometer
PAR aerosol algorithm instrument sensor
2010/11/24
The direct solar radiation observed by instruments aboard the ground-based solar tracking devices, is needed to estimate aerosol optical thickness. However, the instruments on unstable platforms such ...