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首页> 外文期刊>Remote Sensing of Environment: An Interdisciplinary Journal >ALGORITHMS FOR EXTRACTING INFORMATION FROM REMOTE THERMAL-IR OBSERVATIONS OF THE EARTHS SURFACE
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ALGORITHMS FOR EXTRACTING INFORMATION FROM REMOTE THERMAL-IR OBSERVATIONS OF THE EARTHS SURFACE

机译：从EARTHS表面的远程红外观察中提取信息的算法

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Thermal infrared remote sensing offers the possibility of monitoring the surface energy budget on regional and global scales. However, thermal observations have had limited utility because of difficulties associated with unknown surface emissivities, challenging atmospheric corrections, and the presence of numerous variables that affect the relationship between thermal radiance and the partitioning of energy fluxes at the surface. The importance of distinguishing between aerodynamic and radiative temperatures is discussed and definitions for each are proposed. Considerable progress is being made with atmospheric corrections and measurement of surface emissivity so that accuracies of 1 degrees to 2 degrees C in surface infrared temperature and 0.01 to 0.02 in surface emissivity may be within reach. Five methods are described for extracting information about the surface energy budget from a combination of satellite thermal observations and various amounts of ancillary data. Although no single method appears to work under all conditions, uncertainties in daily fluxes of surface sensible and latent heat appear to be 1 to 2 MJm(-2) based on past studies. Thermal infrared observations will continue to play an essential role in partitioning available surface energy into sensible and latent heat components. [References: 61]
机译：热红外遥感提供了在区域和全球范围内监视表面能收支的可能性。但是，由于与未知的表面发射率相关的困难，具有挑战性的大气校正以及影响热辐射与表面能量通量分配之间关系的众多变量的存在，热观测的应用受到了限制。讨论了区分空气动力学温度和辐射温度的重要性，并提出了每种温度的定义。大气校正和表面发射率的测量正在取得相当大的进展，以使表面红外温度的精度在1到2摄氏度，表面发射率的在0.01到0.02之间是可以达到的。描述了从卫星热观测和各种辅助数据的组合中提取有关表面能收支信息的五种方法。尽管没有一种方法在所有条件下都可行，但根据以往的研究，表面感热和潜热的日通量的不确定性似乎为1到2 MJm（-2）。热红外观测将继续在将可用的表面能划分为显热和潜热成分方面发挥重要作用。 [参考：61]

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