Full Spectrum Cloudy Scene Simulation

摘要

The MCScene code, a high fidelity model for full optical spectrum (UV to LWIR) spectral image simulation, will bediscussed and its features illustrated with sample calculations. The MCScene simulation is based on a Direct SimulationMonte Carlo approach for modeling 3D atmospheric radiative transport, as well as spatially inhomogeneous surfacesincluding surface BRDF effects. The model includes treatment of land and ocean surfaces, 3D terrain, 3D surfaceobjects, and effects of finite clouds with surface shadowing. This paper will review the more recent upgrades to themodel including the development of an approach for incorporating direct and scattered thermal emission predictions intothe MCScene simulations. Sample calculations presented in the paper include a full optical spectrum simulation from thevisible to the LWIR for a desert scene under a broken cloud field. This scene was derived from an AVIRIS visible toSWIR spectral imaging data collect over the Virgin Mountains in Nevada. The data has been extrapolated to the thermalIR. Other calculations include complex 3D clouds over urban and rural terrain.