Reflection Spectra Coupling Analysis and Polarized Modeling of Optically Active Particles in Lakes

The coupling between optically active substances of algae particles and inorganic suspended solids water makes the characteristics reflection spectra complex changeable. This modeling inversion polarization remote sensing in class II difficult. In our study, considering influence mixing ratio solids, sensor incidence angle, solar zenith angle on spectrum, we analyzed polarized bidirectional reflectance particulate matter through control experiments mixed components laboratory. With Chaohu Lake China as an example, was investigated by water-leaving radiation. results showed that characteristic bands 570, 675, 705 nm, degree linear (DOLP) sensitive to radiation rather than reflectance. variation observation were strongly interfered with flare when close 50° meridian plane azimuth 180°, but DOLP less affected, while also having a low correlation high concentration region. Combined at 675 model established partial least squares regression (PLSR) determination coefficient (R2) 0.91, root mean square error (RMSE) 0.035, verification accuracy 0.959. shows has better prediction ability for provides good support spectral unmixing water.