The Crop Canopy Reflectance Simulated By The ACRM Model In Typical Area

The surface radiation obtained by one viewing angle sensor can not usually reflect the actual feature of surface materials. While multi-angle information can provide more information to reveal features of surface materials, which provide more accurate based-data for qualitative and quantitative Remote sensing.Multi-angle remote sensing data appears,which developed on the inversion for the object target reflection and radiation direction and the surface biochemical structure parameter.Therefore,the study about multi-angle information has attracted many experts and scholars.At present, the MISR(Multi-angle Imaging Spectro Radiometer)sensor can realize multiple perspectives, continuous on the ground, but the new data source is not yet mature.It has not been widely used in China.Due to the radiative transfer model ACRM(A Two-Layer Canopy Reflectance Model) simulation under different viewing angles can be calculated canopy reflectance of 400 nm to 2500 nm.So ACRM model can solve the problem on multi-angle information.many scholars have to in-depth study of the model, but this model is less used in southern China.Many scholars have further researched on the ACRM model.But this model is less used in southern China.In order to solve the problem that the ACRM model is less used in southern China.In the paper,it has set study area in southern China.It has three different periods of the field measured data.These data apply and verify for the ACRM model.In the paper,the main research work include:(1) data acquisition and processing in the study area.Data including sample of canopy reflectance, soil reflectance and leaf area index(LAI), SPAD(Soil and Plant Analyzer Development) value.etc.(2) For the parameters sensibility analysis of the radiative transfer modelACRM.Based on the different values of the parameters, it can calculates the sensitivity of the parameters.By running the ACRM model,it found that the sensitivity of the LAI is far greater than other parameters.(3)For each sample,simulated values calculated by the model were compared with the measured values to confirmatory analysis.We find that most of the relative error between simulated and measured values within 10%, and for each sample point,RMSE(root-mean-square error) values less than 0.02, indicating ACRM model is applied to the canopy multi-angle simulation in southern China.