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首页> 外文期刊>Journal of Applied Remote Sensing >Monitoring rice-crop growth with ENVISAT-1/ASAR alternating polarization mode
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Monitoring rice-crop growth with ENVISAT-1/ASAR alternating polarization mode

机译:用Envisat-1 / ASAR交替偏振模式监测稻田生长

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The Hiroshima Institute of Technology (HIT) manages direct downlinks for microwave and optical earth observation satellite data in Japan. This study focuses on validating rice monitoring using ground truth data from ENIVISAT-1/ASAR, such as the height of rice crop, vegetation cover, and leaf area index in test sites in the Hiroshima district in Japan. ENVISAT-1/ASAR data can monitor the rice-crop growing cycle using alternating polarization (AP) mode images. However, ASAR data is influenced by several parameters, such as land-cover structure, and the direction and alignment of rice fields in the test sites. To investigate these parameters, in this study the validation was combined with microwave image data and ground truth data for rice-crop fields. Multitemporal, multidirection (descending and ascending), and multiangle ASAR AP-mode images were used to investigate the rice-crop growing cycle. Finally, the extraction of rice-planted areas was attempted using multitemporal ASAR AP mode data, such as VV/VH and HH/HV. This study clarifies that the estimated rice-planted area agrees with the existing statistical data for areas within the rice field. In addition, HH/HV is more effective than VV/VH in extracting the rice-planted area.
机译:广岛科技大学(命中)管理日本微波和光学地球观测卫星数据的直接下行链路。本研究重点介绍,使用尼期草-1 / ASAR的地面真理数据进行验证稻米监测,例如日本广岛区考历区的稻米作物,植被封面和叶面积指数。 Envisat-1 / ASAR数据可以使用交替极化(AP)模式图像来监测稻米作物生长周期。然而,ASAR数据受到几个参数的影响,例如陆地覆盖结构,以及测试部位中稻田的方向和对准。为了研究这些参数,在本研究中,验证与微波图像数据和稻田字段的地面真理数据相结合。 Multi8poral,Multiafirection(降序和升序)和多聚ASAR AP模式图像用于研究稻米作物生长循环。最后,使用多型ASAR AP模式数据(例如VV / VH和HH / HV)尝试稻米种植区域的提取。本研究阐明了估计的稻米种植区域同意稻田内的现有区域的统计数据。此外,HH / HV在提取稻米面积方面比VV / VH更有效。

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