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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Multiscale techniques for the detection of precipitation using thermal IR satellite images
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Multiscale techniques for the detection of precipitation using thermal IR satellite images

机译:利用红外热卫星图像探测降水的多尺度技术

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It is thought that satellite thermal infrared (IR) images can aid to the detection of precipitation, an interesting possibility due to the existence of geostationary satellites with thermal IR sensors which would enable a good spatial and temporal tracking of rain and storms. In this letter, we explore the application of multiscale/multifractal techniques in the design of new methods for the assessment and tracking of pluviometry. We first identify the main streamlines by a singularity analysis of the wavelet projections of the IR record. From the streamlines, we derive a proxy scalar image that represents the result of pure horizontal advection. From the comparison of original and proxy we localize the places at which horizontal advection fails, which we identify with convection places. We illustrate our methodology with thermal IR images from Metosat acquired during heavy tropical rainfall, and compare the results with some data from the Tropical Rainfall Measuring Mission satellite.
机译:人们认为,卫星热红外(IR)图像可以帮助检测降水,这是一个有趣的可能性,因为存在带有热红外传感器的对地静止卫星,这将使降雨和暴风雨有一个良好的时空追踪。在这封信中,我们探讨了多尺度/多重分形技术在设计和评估比色法的新方法中的应用。我们首先通过对IR记录的小波投影进行奇异性分析来确定主要流线。从流线中,我们得出代表纯水平对流结果的代理标量图像。通过原始和代理的比较,我们确定了水平对流失败的位置,我们将其确定为对流位置。我们用来自热带雨天的Metosat的热红外图像说明了我们的方法,并将结果与​​热带雨量测量任务卫星的一些数据进行了比较。

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