Imaging modeling of integrated imaging spectrometers for undulating terrain with uneven surface feature distribution
Integrated imaging spectrometers can effectively improve the monitoring capability of terrestrial ecosystems.Imaging simulation in the design and development of spectrometers is identified as an important means to improve their efficiency.To overcome the shortcomings of current imaging simulation in scene modeling and radiation transport models,this study developed a full-link hyperspectral imaging simulation model.Using this model,this study conducted preliminary assessments of load efficiency.First,heterogeneous modeling for large-scale scenes was conducted according to the observation targets of loads.Then,a surface radiation transport model containing fluorescence radiation and thermal radiation was derived for undulating terrain with uneven surface feature distribution(also referred to as unevenly undulating surface).Finally,by integrating the imaging model of grating spectrometers,this study established a full-link imaging simulation model.To determine the impacts of the adjacency effect of the unevenly undulating surface on the spatial distribution of solar-induced chlorophyll fluorescence(SIF),this study compared the radiance of red and far-red SIF derived with and without considering the adjacency effect of terrain under the spatial resolution of the used integrated imaging spectrometer.For data on significantly undulating terrain with uneven surface feature distribution,the SIF radiance exhibited differences of up to maxima of 22％and 52％,respectively,and ignoring the adjacency effect led to significant errors in the high-resolution SIF simulations.The imaging modeling method developed in this study can be used for hyperspectral imaging simulation of unevenly undulating surfaces,thus allowing for analyzing the efficiency of integrated imaging spectrometers for composite applications in ecological monitoring.
万方数据
维普
