System and method for modelling moderate resolution atmospheric
propagation
    1.
    发明授权
    System and method for modelling moderate resolution atmospheric propagation 失效
    用于建模中等分辨率大气传播的系统和方法

    公开(公告)号:US5884226A

    公开(公告)日:1999-03-16

    申请号:US867966

    申请日:1997-06-03

    CPC分类号: G01N21/538

    摘要: Recent upgrades to the MOTRAN atmospheric radiation code improve the accuracy of its radiance predictions, especially in the presence of clouds and thick aerosols, and for multiple scattering in regions of strong molecular line absorption. MODTRAN3.5 features a generalized specification of cloud properties, while research version MODTRAN4 implements a Correlated-k (CK) approach for more accurate calculation of multiply scattered radiance. Comparisons to cloud measurements demonstrate the viability of the CK approach. The impact of these upgrades on predictions for AVIRIS viewing scenarios is discussed for both clear and clouded skies; the CK approach provides refined predictions for AVIRIS nadir and near-nadir viewing.

    摘要翻译: 最近升级到MOTRAN大气辐射代码提高了其辐射预测的准确性,特别是在云层和厚气溶胶的存在下,以及在强分子线吸收区域的多重散射。 MODTRAN3.5具有云属性的通用规范,而MODTRAN4的研究版本实现了相关k(CK)方法,以更准确地计算多重散射辐射。 与云测量的比较表明CK方法的可行性。 讨论了这些升级对AVIRIS观测情景的预测的影响,用于清晰和阴云密布的天空; CK方法为AVIRIS最低点和近最低点观察提供了精确的预测。

    System for modelling low resolution atmospheric propagation
    2.
    发明授权
    System for modelling low resolution atmospheric propagation 失效
    低分辨率大气传播建模系统

    公开(公告)号:US5075856A

    公开(公告)日:1991-12-24

    申请号:US383372

    申请日:1989-07-17

    IPC分类号: G01J5/00 G01S7/48

    摘要: LOWTRAN 7 is a low-resolution propagation model and computer code for predicting atmospheric transmittance and background radiance from 0 to 50,000 cm.sup.- at a resolution of 20 cm.sup.-. The code is based on the LOWTRAN 6 (1983) model with a number of improvements. Multiple scattered radiation has been added to the model as well as new molecular band model parameters and new ozone and molecular oxygen absorption parameters for the UV. Other modifications include a wind-dependent desert model, new cirrus cloud models, and new cloud and rain models. The code also includes new representative (geographical and seasonal) atmospheric models and updated aerosol models with options to replace them with user-derived values. An improved extra-terrestrial solar source function is also included. Six modes of program execution are allowed with the new model and computer code for a given slant path geometry.

    摘要翻译: LOWTRAN 7是一种低分辨率传播模型和计算机代码,用于在20厘米的分辨率下预测大气透射率和背景辐射范围为0至50,000厘米。 该代码基于LOWTRAN 6(1983)模型,具有许多改进。 多分散辐射已经被添加到模型中,以及新的分子带模型参数和新的臭氧和分子氧吸收参数的UV。 其他修改包括风依赖沙漠模型,新的卷云模型和新的云和雨模型。 该代码还包括新的代表性(地理和季节性)大气模型和更新的气溶胶模型,其中可选择用用户派生的值替代它们。 还包括改进的地面外太阳能源功能。 对于给定的倾斜路径几何,新模型和计算机代码允许执行六种程序执行模式。