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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Striping Noise Mitigation for Tropical Rainfall Measuring Mission Microwave Imager Observations
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Striping Noise Mitigation for Tropical Rainfall Measuring Mission Microwave Imager Observations

机译：热带降雨测量任务微波成像观测的条纹噪声缓解

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摘要

The conical-scanning Tropical Rainfall Measuring Mission Microwave Imager (TMI), which plays an important role in monitoring global precipitation, has nine channels. A clear striping noise feature is found in pitch-over maneuver data of deep-space and earth-view observations at all nine channels of the TMI. A modified striping noise mitigation algorithm is used to extract the striping noise from deep-space and earth-scene observations. The magnitude of the striping noise extracted from TMI channel 10.65 V, 10.65 H, and 37.0 H measurements is about 0.4 K and more than 1.5 K for channel 85.5 V and 85.5 H measurements. After striping noise mitigation, no visible striping feature is seen in the observation-minus-simulation distributions of both deep-space and earth-scene brightness temperatures. Comparisons of the liquid water path (LWP) retrieved from TMI brightness temperatures with and without striping noise mitigation show that the striping noise in brightness temperatures results in a striping feature in LWP retrievals. When the striping noise is not removed from TMI observations, LWP retrievals exhibit a cross-track striping feature. The striping noise leads to a greater retrieval difference in larger LWP areas.
机译：圆锥形扫描热带降雨测量任务微波成像仪（TMI），在监测全球降水中起着重要作用，具有九个渠道。在TMI的所有九个通道的深度空间和地球视图的间距机动数据中找到了清晰的条形噪声功能。修改的条带化噪声缓解算法用于从深空和地球场景观测中提取条带噪声。从TMI通道10.65V，10.65H和37.0H测量中提取的条带噪声的大小为通道85.5 V和85.5小时测量值约为0.4k至大于1.5k。在噪声缓解后，在深空和地球场景亮度温度的观察 - 减去仿真分布中没有看到可见条带特征。从TMI亮度温度下检索的液体水路（LWP）的比较，无需条纹噪声缓解，表明亮度温度下的条带噪声导致LWP检索中的条带特征。当从TMI观察中未移除条带噪声时，LWP检索呈现交叉轨道条带。条带噪声导致更大的LWP区域的检索差异更大。

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