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首页> 外文会议>International astronautical congress;IAC 2008 >IMPROVED LAND SURFACE TEMPERATURE RETRIEVAL METHOD FOR THE SMALL SATELLITE FLYING LAPTOP
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IMPROVED LAND SURFACE TEMPERATURE RETRIEVAL METHOD FOR THE SMALL SATELLITE FLYING LAPTOP

机译：小卫星飞行膝上型计算机的改进地表温度反演方法

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The enhanced algorithms developed in this study for land surface temperature retrieval combine the split-window method with the multi-angle method, employing a large number of view angles between nadir and 60 degrees zenith angle. The new algorithms are intended for analysing data from the Thermal Infrared Camera System of the small satellite Flying Laptop, a technology demonstration and earth observation satellite currently being developed at the Institute of Space Systems, Universitaet Stuttgart. The Thermal Infrared Camera System will observe at 8.0 to 9.2 urn and at 10.4 to 12.6 μm. The attitude control system of the satellite permits arbitrary pointing angles. This combination of bi-spectral camera system and multi-angle observation capability offers means of improving land surface temperature retrieval. In order to investigate the utility of the prospective observations, data has been modelled numerically for a wide range of atmospheric properties, using the radiation transport model MODTRAN. The resulting data was analysed statistically and a number of algorithms for temperature retrieval have been derived, depending on available angles. The multi-angle method improves accuracy of the retrieved temperature compared to the employment of the split-window method only, especially for very humid atmospheres. A standard deviation below one Kelvin can be achieved for land surface temperature.
机译：在这项研究中开发的用于陆地表面温度检索的增强算法将分割窗口方法与多角度方法相结合，并采用了最低点和最高角60度之间的大量视角。新算法旨在分析小型卫星飞行笔记本电脑的红外热像仪系统中的数据，该技术是斯图加特大学空间系统研究所目前正在开发的技术演示和对地观测卫星。红外热像仪系统的观测波长为8.0至9.2 um，10.4至12.6μm。卫星的姿态控制系统允许任意指向角度。双光谱相机系统和多角度观测功能的结合提供了改善地表温度检索的手段。为了研究前瞻性观测的效用，已使用辐射传输模型MODTRAN对各种大气性质的数据进行了数值建模。对所得数据进行统计分析，并根据可用角度推导了许多用于温度检索的算法。与仅使用分割窗口方法相比，多角度方法提高了取回温度的精度，尤其是在非常潮湿的环境中。陆地表面温度可以达到低于1开尔文的标准偏差。

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