In this paper, an approach for joint estimation of grassland LAI and Cab from unmanned aerial vehicle (UAV) hyperspectral data was proposed. Firstly, based on PROSAIL (PROSPECT+SAIL) model, 15 typical hyperspectral VIs were simulated and analyzed to identify optimal VIs for LAI and Cab estimation. Secondly, three different combinations of VIs were tested in the construction of LAI and Cab inversion matrices. Thirdly, 3-layer 2-dimension VIs matrix was generated to determine the relationship between VIs and LAI values and Cab values. Finally, LAI and Cab were joint retrieved according to the cells of VIs matrix.
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