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首页> 外文会议>Conference on Targets and Backgrounds IX: Characterization and Representation Apr 21-22, 2003 Orlando, Florida, USA >Obscurant representation for realistic IR simulation
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Obscurant representation for realistic IR simulation

机译：遮掩联合国的代表权，进行逼真的模拟

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摘要

Obscurant representation is a key component of ground battlefield simulation, especially in the infrared domain. Obscurant are special counter measures (clouds) classically used to hide armored vehicles and deceive threatens. Obscurants are very difficult to represent especially because of multi diffusion effects of hot particles and smoke, but this representation is very important to quantify the efficiency of the decoy. This article describes a new model being involved in the simulation workshop CHORALE of the French DGA [1], [2] & [3]. The simulation workshop CHORALE developed in collaboration with OKTAL SE company is used by government services and industrial companies for weapon system validation and qualification trials in the infrared domain. The main operational reference for CHORALE is the assessment of the infrared guidance system of the Storm Shadow missile French version, called Scalp. This new model, integrated in CHORALE, enables to simulate the emitted radiance and the transmission of any pre computed obscurant cloud in the virtual battlefield. In the modeling step, the cloud is defined by a set of "voxels" (elementary volume elements). Each voxel contains the spectral extinction coefficient and the spectral scattering coefficients. The shape, i.e. the voxels content, is changing with time to convey the dynamic evolution of the obscurant. In the Non Real Time rendering step, primary rays are traced inside the clouds. For each voxel, scattering rays are then traced to their neighboring voxels and the local hot sources. Actually, ray tracing is used to solve the Radiative Transfer Equation. The main advantage is to be able to solve it taking into account the synthetic environment: the local terrain, the target hidden in the cloud, the atmospheric and weather conditions. The main originality is the multithreading ray tracing which enables to tackle huge quantities of rays in complex geometric environment.
机译：暗物表示是地面战场模拟的关键组成部分，尤其是在红外领域。模糊处理是传统上用来隐藏装甲车辆并欺骗威胁的特殊对策（云）。由于热颗粒和烟雾的多重扩散作用，很难表示遮蔽物，但是这种表示对于量化诱饵的效率非常重要。本文介绍了法国DGA [1]，[2]和[3]的仿真车间CHORALE中涉及的新模型。与OKTAL SE公司合作开发的模拟车间CHORALE被政府服务和工业公司用于红外领域的武器系统验证和鉴定试验。 CHORALE的主要操作参考是对名为“头皮”的法国“暴风影”导弹的红外制导系统的评估。集成在CHORALE中的这个新模型可以模拟虚拟战场中的辐射辐射以及任何预先计算的模糊云的传输。在建模步骤中，云由一组“体素”（基本体元）定义。每个体素包含光谱消光系数和光谱散射系数。形状（即体素含量）随时间变化以传达遮盖剂的动态演变。在“非实时”渲染步骤中，将在云内部跟踪主光线。对于每个体素，然后将散射射线追踪到其相邻的体素和局部热源。实际上，射线追踪是用来求解辐射传递方程的。主要优势是能够在综合环境下解决该问题：本地地形，隐藏在云中的目标，大气和天气条件。主要创意是多线程射线跟踪，它可以在复杂的几何环境中处理大量射线。

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