The simulation of remote sensing images is necessary for many tasks, such as the definition of future Earth Observation systems, the optimization of instrument parameters, and the development and validation of data processing algorithms. The presented hyperspectral scene simulator has been developed in the frame of the Environmental Mapping and Analysis Program (EnMAP) mission. It consists of f...

[1] The spectrally resolved infrared radiances observed by AIRS provide a strict and insightful test for general circulation models (GCMs). We compare the clearand totalsky spectra simulated from the Geophysical Fluid Dynamics Laboratory GCM using a high resolution radiation code with the AIRS observations. After ensuring consistency in the sampling of the observed and simulated spectra and a p...

Point-Based Global Illumination (PBGI) is a popular rendering method in special effects and motion picture productions. This algorithm provides a diffuse global illumination solution by caching radiance in a mesh-less hierarchical data structure during a pre-process, while solving for visibility over this cache, at rendering time and for each receiver, using microbuffers, which are localized de...

Realistic modeling of high-resolution earth radiation signals in the visible-thermal spectral domain remains difficult, due to complex interdependence induced by heterogeneous and rugged features land surface. To find trade-off between accuracy efficiency for image simulation, this paper established a unified simulation framework entire domain, based on energy balance solar-reflected thermal co...

A Monte Carlo ray tracing system, known as 'the Advanced RAdiometric RAy Tracer' (ARARAT) has been developed as a tool for simulating radiance as measured by remote sensing instruments. The system takes 3-D geometric models of vegetation and/or surfac~ topographic data (Digital Elevation ModelDEM) with associated radiometric attributes, and renders a scene for given illumination conditions for ...

The QUick Image Display (QUID) model accurately computes and displays radiance images of aircraft and other objects, generically called targets, at animation rates while the target undergoes unrestricted flight. Animation rates are obtained without sacrificing radiometric accuracy by using two important innovations. First, QUID has been implemented using the Open Scene Graph (OSG) library, an o...

Progressive light transport simulations aspire a physically-based, consistent rendering to obtain visually appealing illumination effects, depth and realism. Thereby, the handling of large scenes is a difficult problem, as in typical scene subdivision approaches the parallel processing requires frequent synchronization due to the bouncing of light throughout the scene. In practice, however, onl...

Measurements of up-looking spectral radiances measured during the Convection and Moisture Experiment and down-looking spectral radiances measured at one of the Atmospheric Radiation Measurement sites are compared with simulations with use of two different line-by-line models. Simulations are performed in tightly controlled conditions to verify the behavior of the models. Spectra computed at hig...