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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Refined Typhoon Geometric Center Derived From a High Spatiotemporal Resolution Geostationary Satellite Imaging System
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Refined Typhoon Geometric Center Derived From a High Spatiotemporal Resolution Geostationary Satellite Imaging System

机译：高时空分辨率地球静止卫星成像系统衍生的精细台风几何中心

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摘要

GaoFen-4 (GF-4) and Himawari-8 (H8) imagery data were utilized to demonstrate and validate the impact of enhanced spatiotemporal imaging resolution when tracking Super Typhoon Nepartak (2016). The GF-4 remote sensing satellite is the China's first civilian high-resolution geostationary optical satellite, which has been launched at the end of December 2015. A classical TV-L1 optical flow (OF) algorithm and H8 cloud-top products were also presented to derive cloud-tracking motions, rotating centers, and geometric centers of Super Typhoon Nepartak to investigate the inner-core dynamics and structures of the typhoon. The typhoon positions of the rotating centers derived from the lowest velocities using GF-4 showed good agreement with centers derived using the H8 cloud-top pressure and height threshold-based method. The OF method failed to retrieve the typhoon center using H8 imagery data due to the relatively coarse spatiotemporal resolution. Conversely, refined features and shifts in the track of Typhoon Nepartak were apparent in the GF-4 imagery data as compared to H8. These findings illustrate the significant impact of a satellite imaging system with a higher spatiotemporal resolution when investigating the dynamics features of typhoon.
机译：在跟踪超级台风尼巴塔克（2016）时，利用GaoFen-4（GF-4）和Himawari-8（H8）图像数据来演示和验证时空成像分辨率增强的影响。 GF-4遥感卫星是中国第一颗民用高分辨率对地静止光学卫星，已于2015年12月下旬发射。还介绍了经典的TV-L1光流（OF）算法和H8云顶产品得出超级台风尼巴塔克的云跟踪运动，旋转中心和几何中心，以研究台风的内芯动力学和结构。使用GF-4从最低速度得出的旋转中心的台风位置与使用基于H8云顶压力和高度阈值的方法得出的中心的台风显示出良好的一致性。 OF方法由于时空分辨率相对较差而无法使用H8影像数据检索台风中心。相反，与H8相比，GF-4影像数据清楚显示了台风Nepartak的精细特征和轨迹变化。这些发现说明了在调查台风的动力学特征时，具有更高时空分辨率的卫星成像系统的重大影响。

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  • 来源
    《IEEE Geoscience and Remote Sensing Letters》 |2019年第4期|499-503|共5页
  • 作者

    Sun Fenglin; Min Min; Qin Danyu; Wang Fu; Hu Juyang;

  • 作者单位

    China Meteorol Adm, Natl Satellite Meteorol Ctr, Key Lab Radiometr Calibrat & Validat Environm Sat, Beijing 100081, Peoples R China;

    China Meteorol Adm, Natl Satellite Meteorol Ctr, Key Lab Radiometr Calibrat & Validat Environm Sat, Beijing 100081, Peoples R China;

    China Meteorol Adm, Natl Satellite Meteorol Ctr, Key Lab Radiometr Calibrat & Validat Environm Sat, Beijing 100081, Peoples R China;

    China Meteorol Adm, Natl Satellite Meteorol Ctr, Key Lab Radiometr Calibrat & Validat Environm Sat, Beijing 100081, Peoples R China;

    China Meteorol Adm, Natl Satellite Meteorol Ctr, Key Lab Radiometr Calibrat & Validat Environm Sat, Beijing 100081, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    GaoFen-4 (GF-4); Himawari-8 (H8); optical flow (OF); rotating center; Typhoon Nepartak;

    机译：高芬-4（GF-4）;Himawari-8（H8）;光学流动（of）;旋转中心;台风奈巴克;

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